Shoes in Training
Reading time: about 11 minutes. Numbers in square brackets, like [1], point to the References section at the
end. This post builds on our earlier guides, "Will They Stick With It?" and "Rent, Buy or Carry?" [16].
An athlete spends a small fortune on a performance shoe. It is built for the one thing that
matters: explosive, precise footwork when the match is on the line. Then the week begins.
Drills, footwork ladders, multi-shuttle routines, practice games, a hall with an abrasive floor. By
the time tournament day arrives, the shoe the athlete saved for the big moment has already
done most of its grip-bearing work in a training session nobody will remember.
This post is for serious and competitive athletes, and the coaches and parents who fund them. It
looks at why soles wear out before matches, why non-marking rules make the problem sharper,
and what an athlete should weigh before putting a protective layer such as SoleD under a
performance shoe.
The short version
- Soles wear out with use, and worn soles mean less grip and stability. Court shoes are
commonly said to last on the order of 45 to 60 hours of play [1][2], and most of those hours
for a training athlete are drills, not matches.
- Non-marking rules keep tightening the options. Many indoor sports make non-marking
soles mandatory [11], and venues enforce it [12][14].
- A protective, non-marking layer such as SoleD aims to do two jobs at once: shield the
original sole during drills, and make a shoe court-compliant. As SoleD describes it, it
converts a regular shoe into a non-marking one instantly, without damaging the original
shoe.
- It is not a free lunch. Anything added under a performance shoe can change feel, so
athletes should test it, check their sponsor and federation rules, and keep match-day
decisions deliberate (see When not to use it).
- The maths is simple: compare the cost per hour of your performance shoe with the cost per
hour of whatever protects it.
The real problem: soles wear before the match
Outsoles are consumables. Guidance from a UK tennis club puts the typical life of a court shoe
at about 45 to 60 hours of use, with more wear meaning less traction and stability and a higher
risk of injury [1]. A tennis shoe guide gives a similar figure of 40 to 60 hours, or 6 to 12 months,
and suggests that frequent players on hard courts can need replacements every three to six
months [2]. These numbers come from tennis, so treat them as a reference point and not a rule
for every sport.
What affects the rate? Surface matters: hard courts are more abrasive on outsoles [1], and
badminton guidance notes that synthetic courts, though grippy, can wear soles faster [4]. Grit
matters too: one badminton retailer advises keeping court shoes indoor-only, because walking
to the hall in them grinds grit into the sole and ruins grip [3]. The practical sign of a finished
outsole is simple: the pattern wears smooth and the grip goes [3][5].
Now count the hours the way an athlete does. A competitive player might train ten hours a
week and play two hours of matches. Roughly 80% of the shoe's grip-bearing life is spent in
training. The match shoe is, in effect, used up by practice.
The cost-per-hour view
The numbers below are assumptions to show the method. Swap in your own.
- A performance shoe costs ₹12,000 and gives about 50 hours of good grip, a figure
borrowed from the tennis guidance above [1]. That is ₹240 per hour.
- At 10 training hours and 2 match hours a week, the shoe is spent in about 4 weeks, and
₹2,400 of every week's shoe wear goes on training.
- If training moved off the performance shoe, the same 50 hours would stretch across matches
alone: in theory about 25 weeks. In practice, midsole foam and uppers also age with time, so
treat that as an upper bound, not a promise.
Footwear reviewers use a similar idea, judging whether to replace or upgrade a shoe by cost
per wear [5]. The question for any protective approach is whether it costs less per hour than the
shoe it protects. For SoleD, that means comparing its price divided by the hours it lasts against
the ₹240 an hour in this example. A cheap dedicated training pair, say ₹3,000 for 50 hours,
works out at ₹60 an hour, so that is the real benchmark to beat.
Non-marking rules: the second squeeze
The athlete's problem has a second edge. Indoor facilities protect their floors, and the rule is
widespread: non-marking shoes are mandatory in many indoor sports such as badminton,
squash and basketball [11]. Regular hard-soled shoes can leave dark marks or scratches [15].
Enforcement is not theoretical. A UK squash club told members that wrong shoes leave black
marks that cost the club money, and warned it could ask offenders to leave the court [12]. A
university recreation centre's rules require non-marking athletic footwear on gym courts and
prohibit shoes that mark floors [14]. A sports-flooring manufacturer's maintenance guide says
everyone using the surface must wear dedicated indoor-sports footwear, and that damage from
inappropriate use may not be covered [13].
For an athlete, this creates awkward situations: a training session in a hall that bans your
marking shoes, a venue change at short notice, a warm-up on a floor you were not expecting. A
non-marking layer that goes over the shoe you already own addresses that, with SoleD
positioned for exactly this: light, fits any shoe, ready when plans change.
One honest clarification. Many dedicated court shoes are already non-marking. For those,
SoleD's value is mostly the sole protection. Where it adds compliance is for shoes that are not
non-marking: cross-training shoes, outdoor or running shoes used for conditioning, or a
performance shoe from a sport whose soles mark.
What else should an athlete weigh?
The cost maths is only one input. Athletes make footwear decisions on feel, trust and routine
too. These are the factors worth thinking through.
1. Grip that is predictable on match day
A fresh, unworn outsole behaves predictably, and footwork depends on predictability. Keeping
the match shoe's grip intact for the games that matter is the core argument for any protective
layer. The LTA club page also records a member's serious ankle injury that he linked to
insufficient grip [1], a reminder that grip is a safety matter as well as a performance one.
2. Break-in versus protection: the real tension
Here the evidence pulls two ways. Players need to wear shoes in: basketball guidance suggests
starting 2 to 3 weeks before the first real game [9], and one NBA player said he practises in new
shoes two or three times before wearing them in a game [8]. Others see it differently: another
player in the same roundtable said he does not practise in his game shoes and breaks them in
during the game [8]. So there is no single professional norm.
A sensible reading is that wearing shoes in is mostly about the upper and midsole (fit and flex),
not the outsole's tread. A protective layer lets an athlete break in the shoe on the foot without
grinding down the grip surface, if the layer does not change the feel enough to defeat the
purpose. That is a test the athlete has to run.
3. Court feel and stability
Low-to-the-ground court feel is a defining quality of some performance badminton shoes [5].
Anything added under the sole can change height, flexibility and lateral stability. That is why a
conversion product should be tested on a familiar floor before a hard session, and why this
section matters more for elite athletes than for casual players.
4. Rotation and load variation
A well-known Luxembourg study followed 264 recreational runners for 22 weeks and found that
those who rotated among several pairs had about 39% lower risk of running injury than those
who ran almost entirely in one pair [6]. Researchers caution that the cause is uncertain, since
more cautious runners may also be the ones who rotate [7]. It was a running study, so it does
not prove the same for court sports, but it supports a sensible habit: do not run one shoe into
the ground, and vary what you wear in training.
5. Sponsor, federation and tournament rules
Many elite athletes are bound by sponsor agreements and competition equipment rules. Before
adding anything to a performance shoe, check what your contract and your federation allow,
especially for matches. This is my suggestion rather than a finding from the sources above, but
it is the first question a coach should ask.
6. Who pays for the shoes?
Not every athlete has a free supply. In a student-athlete piece from a US college, players said
they usually fund their own footwear, and some keep separate practice and game pairs [10]. For
academy athletes, semi-professionals and their families, shoe wear is a real line in the budget.
7. Venue goodwill and logistics
Athletes who train at several venues face different rules in each. Being able to meet a
non-marking requirement without carrying a second full pair of shoes simplifies the bag and
avoids being turned away [12]. It also keeps relations with venue staff smooth, which matters
for athletes who depend on shared facilities.
Options for protecting a performance shoe
Approach Protects match
shoe's sole
Feel consistency Cost pattern Practical notes
Train in the
performance shoe
No High: same shoe Fastest wear; ₹240 an
hour in the example
Simple, but spends
the shoe on drills
Separate budget
training pair
Yes Lower: different shoe
from match pair
About ₹60 an hour in
the example
Needs a second pair
to carry and store
Rotate two
identical
performance pairs
Partly: wear is
spread, not avoided
High Same cost per hour,
replaced less often
Highest outlay; may
extend total life [2]
Protective layer
such as SoleD
Yes, as SoleD
describes it
Needs testing: layer
may alter feel
Add SoleD's price and
lifespan
Light; also makes
shoes non-marking;
check rules
When not to use it
- On match day, unless your federation, sponsor and venue allow it and you have thoroughly
tested it in similar conditions.
- If it changes your stability or footwork, even slightly, in explosive drills. Stop and talk to
your coach.
- On unfamiliar surfaces before a trial run at moderate intensity.
- If you already own a good, non-marking training pair that costs less per hour and suits
you.
Case studies: what the evidence and real athletes show
These are documented examples, not invented stories. Illustrative scenarios follow in the next
section and are labelled as such.
Case study 1: How long court shoes really last
A UK tennis club advises that a court shoe usually lasts about 45 to 60 hours, depending on
surface, style and player, with hard courts wearing outsoles faster [1]. A tennis guide offers 40
to 60 hours or 6 to 12 months, and notes that rotating two pairs can extend life [2]. Lesson: a
training-heavy athlete can burn through a shoe's life in weeks, so protecting it during drills has
real arithmetic behind it. Caveat: the figures come from tennis and from retail-side guides, so
test against your own sport.
Case study 2: The Luxembourg shoe-rotation study
In a 22-week study of 264 runners, those who used multiple pairs had 39% lower injury risk
than those who stuck to one [6]. The authors' proposed explanation is varied loading on the
lower leg, but other experts note the benefit may partly reflect more careful runners [7].
Lesson: varying shoes is a plausible protective habit, though this is running evidence and not
proof for court sports.
Case study 3: How NBA players break in game shoes
In a league roundtable, one guard said he practises in new shoes two or three times before
using them in a game, another breaks them in with individual workouts, and another said he
does not practise in his game shoes at all [8]. Lesson: there is no universal rule. Athletes
choose between protecting a shoe and wearing it in, which is exactly the trade-off a protective
layer is meant to ease.
Case study 4: Student-athletes funding their own shoes
Players at a US college described having to provide their own footwear, with some, such as
football players, keeping separate practice and game-day pairs, and pitchers wearing shoes out
fast enough to need yearly replacements [10]. Lesson: separating practice and game footwear
is already a common instinct. The question is how to do it affordably, and without carrying extra
pairs.
Context note: the sources are mostly from tennis, running, basketball and general retail
guidance. They show direction, not exact figures for badminton, squash, volleyball or your own
training load.
Use cases: three illustrative scenarios
These are composite examples I wrote to show how the decision plays out. They are not real
athletes.
Scenario A: Dev, 16, state-level shuttler. His family has just bought a ₹14,000 pair for
tournaments. His daily sessions include hours of footwork drills on a synthetic floor. He wears
the new pair in on light sessions for fit and flex, uses a protective layer for the abrasive drills
after a coach-supervised test, and keeps the bare sole for matches.
Scenario B: Kavya, 22, a volleyball libero. Dives, slides and pivots chew up her outsoles. Her
shoes carry sponsor branding, so she first checks her agreement, then uses the protective layer
only in drills, never in matches.
Scenario C: Coach Imran, 45, trains juniors at three venues. Each venue has different
shoe rules. He wants his own shoes to meet the strictest of them without carrying a different
pair for each hall, and he keeps a protective layer in his coaching bag.
A simple testing routine before you rely on it
These steps are my suggestions, not findings from the sources. Adjust them with your coach or
physiotherapist.
- Check the rules of your sponsor, federation and venue.
- Fit check: does it stay put during quick stops and changes of direction? If anything shifts,
stop.
3 Light session first: footwork at moderate intensity on a familiar floor.
4 Escalate gradually to your normal drills, watching grip, stability and any new ankle or foot
discomfort.
5 Track wear: note how the original sole looks after a few weeks compared with an
unprotected pair.
6 Decide match-day use separately, not by default.
7 Review after a month: compare cost per hour and how you feel against your old routine.
The bottom line
For a serious athlete, the performance shoe is a precision instrument that is consumed by use.
Training uses it up faster than matches do, and non-marking rules narrow what can be worn in
practice halls. A protective, non-marking layer such as SoleD offers a way to keep the original
sole for the games that count, while meeting venue rules and keeping a single familiar shoe in
the bag.
Whether it is worth it for you comes down to three tests: does it cost less per hour than the shoe
it protects, does it leave your feel and stability intact, and do your rules allow it? If the answer
to all three is yes, you have just stretched the life of a very expensive shoe.
Draft note for the SoleD team: facts to add before publishing. I could not find independently published
details about SoleD, so the SoleD statements here are limited to the claims you shared. Athletes are a
demanding audience and will look for specifics. Please add or confirm: how many hours of protection one
SoleD gives and how it wears; price and replacement cycle; thickness and weight; effect on grip, court feel
and lateral stability (any test data); the sports, surfaces and shoe models it has been tried with; how it
attaches and stays secure at high intensity; care and cleaning; and whether it is acceptable under federation
and venue rules. I also avoided calling it a "crampon", because that word suggests spikes to most readers. If
that is your product term, we can explain it in the text.
References
[1] New Mills Tennis Club (LTA ClubSpark), "Wearing the right footwear for playing tennis."
https://clubspark.lta.org.uk/NewMillsTennisClub/Tennisfootwear
[2] MyShoesReview, "Boost Your Game: How Often to Replace Tennis Shoes" (retail-side guide).
https://myshoesreview.com/?p=3085
[3] Central Sports (UK), "Best Badminton Shoes UK 2026: Buyer's Guide" (retailer).
https://centralsports.co.uk/blogs/badminton-blog/best-badminton-shoes-uk-2026-buyers-guide-top-picks
[4] MyShoesReview, "How Long Do Badminton Shoes Last?" (retail-side guide).
https://myshoesreview.com/?p=8502
[5] Lazada Sports, "Yonex 65 Z4 vs 65 Z3: Should You Upgrade Your Badminton Shoes?" (retail guide).
https://sports.lazada.sg/yonex-65-z4-vs-65-z3-should-you-upgrade-your-badminton-shoes-sg/
[6] Runner's World Australia, "Study Backs Rotating Shoes to Lower Injury Risk" (reporting Malisoux et al.,
2015, Scandinavian Journal of Medicine & Science in Sports).
https://runnersworldonline.com.au/?p=2690
[7] Runner's Connect, "Does Rotating Your Shoes Reduce Your Risk of Running Injuries?"
https://runnersconnect.net/running-injury-prevention/shoe-rotation-reduce-running-injuries/
[8] Complex, "NBA Roundtable: Sneaker Talk with Players from Around the League."
https://www.complex.com/sneakers/a/zac-dubasik/nba-roundtable
[9] SportDecals, "Basketball Shoes: Frequently Asked Questions" (break-in guidance).
https://sportdecals.com/blogs/p/basketball-shoes-frequently-asked-questions
[10] Willamette Collegian, "Shoes for thought: Willamette athletes on cleat maintenance and exploding
shoelaces" (2020). https://www.willamettecollegian.com/post/shoes-for-thought-willamette-athletes-on-cl
eat-maintenance-and-exploding-shoelaces
[11] Metro Shoes, "Non marking shoes vs marking shoes."
https://www.metroshoes.com/blogs/non-marking-shoes-vs-marking-shoes
[12] Northern Squash Club, "Wear the correct footwear" (2017).
https://wazygoose.com/News/350/1/wear-the-correct-footwear
[13] Tarkett Sports, Omnisports Reference Multi-use maintenance guide (hosted by Jacobsen NZ).
https://jacobsen.co.nz/media/uploads/products/plytixasset/Maintenance-Guide_Omnisports_Reference_M
ulti-use.pdf
[14] Murray State University Campus Recreation, Facility Rules and Regulations.
https://www.murraystate.edu/campus/orgsRecreation/campus-rec-and-wellness/carrhealthbuilding/carrh
ealthrulesregulations.aspx
[15] Rackonnect, "Non-Marking Shoes vs. Regular Shoes: Why the Difference Matters."
https://rackonnect.com/?p=13701
[16] Our earlier posts: "Will They Stick With It? A Parent's Guide to Buying Non-Marking Shoes for a
Beginner" and "Rent, Buy or Carry? The Casual Player's Non-Marking Shoe Dilemma." (Add your
published links here.)
Notes on the sources
- No independent source on SoleD was found. All SoleD statements here are the brand's own
claims as supplied for this draft, and are worded accordingly.
- This post is brand content. If it is published by or for SoleD, say so plainly near the top.
- Several sources are retailer or review-site guides, and the shoe-life figures come mostly from
tennis. They are indicators, not lab measurements for every sport.
- The cost-per-hour numbers are assumptions for illustration, and the athlete scenarios are
fictional composites.
- Nothing here is medical or coaching advice. For pain, injury or equipment questions, consult
your coach, physiotherapist or doctor.
