The app passed 100,000 downloads

When we launched the 30-15 IFT mobile app, the idea was simple: put the test in every pocket, in every gym, on every pitch. Six years later, it has been downloaded more than 100,000 times.

That number belongs to you. Every coach, every athlete, every sport scientist who pressed play before a session helped take this test from a single PDF and a CD-ROM to something used on every continent.

What we learned from the people who wrote in

Since 2021, 1,503 of you took the time to send feedback through the in-app form. We read every single message. The picture that emerged is striking:

• 3 languages spoken: Spanish (47%), English (37%), French (17%). The Spanish-speaking world has owned this test more than any other.
• 120 different sports represented. Yes, 120. Football leads (60% of feedback) but the test has clearly travelled far beyond team sports: handball, basketball, hockey, rugby, tennis, futsal, lacrosse, taekwondo, judo, AFL, even ultimate frisbee and CrossFit.
• 1,154 unique clubs, federations and structures named. From FC Bayern Munich, FC Barcelona, Olympique Lyonnais, Sporting CP and Liverpool FC, to the Brazil Olympic Committee, the Spanish Basketball Federation, the Bahrain U20 national team, and hundreds of academies, universities and amateur clubs nobody outside their town has heard of. That mix is exactly what makes this special.
• 57% Android, 43% iOS, fairly stable across the years.
• 4.5 years of continuous feedback, from November 2021 to last week.

The mobile app is closing. Here is what comes next.

Keeping the app alive on two stores, dozens of phone models, and constantly changing OS rules has become unmanageable. The honest truth:

• Android version: already retired. Too many devices, too many OS versions, too few hours.
• iOS version: still works, but will be removed in the coming months.
• The mobile app, as a product, is finished.

But the test is not going anywhere. We have built something better, simpler, and free:

The Sound Files page

Everything the app did — beeps, voice cues, all four versions (40 m, 28 m, ice, 400 m track), in English, French and Spanish — is now a free web page. No install, no update, no store. Open the page, press play, run the test.

👉 https://30-15ift.com/sound-files/

Bookmark it on your phone, project it through the gym speakers, share the link with your squad. That is it.

And now, the ask. A real one.

For 25 years, coaches have been running the 30-15 IFT and asking the same question: is my player’s VIFT good? Good compared to what? To whom?

We finally have an answer in progress. The new Benchmarks page lets you compare any athlete or squad against real results from clubs, federations and academies around the world. Pick your test version, filter by sport, sex, age, competition level and playing position, and see the percentiles your athletes need to beat.

👉 https://30-15ift.com/benchmarks/

Here is the problem. 100,000 of you downloaded the app. The benchmark database holds only 3,000 results. That is 3%. Ninety-seven percent of the data the 30-15 IFT has ever produced is sitting on someone’s laptop, in someone’s drawer, in a PDF report nobody will ever open again.

Let me say this directly: the test gave you something. Now is the moment to give back.

Every season, every coach reading this runs the 30-15 IFT on a squad. 15 athletes. 20. 30. A youth academy might test 200 players a year. If even 5% of the people who downloaded the app shared one round of testing, we would have more than 60,000 results in the database. That is the biggest VIFT reference dataset ever assembled, by a wide margin. It would settle questions that have been open in our field for two decades.

Right now it is 3%. We can do better.

What to send: sport, club, sex, age category, position if relevant, VIFT. That is it. No names, no identifying information. The form anonymises everything before it enters the database.

How long it takes: two minutes. Literally. Open the form on the Benchmarks page, paste your values, submit.

Why it matters: the only reason coaches in 2026 can compare a U17 academy player against a senior pro is because somebody, somewhere, shared their numbers. The benchmark is only as honest as the community that builds it. If you have ever used a VIFT cut-off, a reference value, or a « good for this level » number to make a decision about an athlete, somebody gave that to you for free. Pay it forward.

👉 Submit your data here (form is at the bottom of the page)

Thank you

To everyone who downloaded, ran, tested, debugged, emailed and shared: the app served you, you served the test. Same deal continues — just on a better platform, with a sharper purpose.

Now go open that old spreadsheet from last pre-season. You know the one. Send the numbers.

See you on the line.

— Martin

L’article 100,000 downloads, and a new chapter for the 30-15 IFT est apparu en premier sur 30-15 IFT.

Full text here

Fitness testing is an important part of the pre-season player screening process. Depending on cultures and preferences, various submaximal or maximal tests are used in soccer, including continuous linear, continuous non-linear or intermittent non-linear (e.g., Yo-Yo and 30-15 Intermittent Fitness Tests, 30-15IFT) protocols. Among these, the 30-15IFT remains the only test that can mimic the physiological demands of most team and racket sports, and be used i) as a performance measure (peak test running speed, V_IFT), ii) to assess a players’ locomotor profile and iii) to improve high-intensity interval training (HIIT) prescription.

But a critical question for the practitioner remains: when is the best time to implement the 30-15IFT within the pre-season phase?

The aim of our paper, published in SPSR, was to describe a simple and effective way to program the 30-15IFT in relation to both session and weekly loads in an elite academy setting.

Figure 1. Physiological responses to the 30-15IFT based on the HIIT Science terminology (6), for an average test performance (peak speed reached, V_IFT) of 19.5 km/h. HR: heart rate. TD: total distance. HSR: high-speed running (>19.8 km/h), MW: mechanical work, RPE: rate of perceived exertion (0-10 scale). The range of values provided are directly linked to test performance (i.e., the faster the V_ITF, the longer the test and the greater the load), but also reflect individual variability in the response to a similar V_IFT.

Figure 2. Within-session example integrating the 30-15IFT. Drills 1: low-intensity possession games (with at least 6 to 8 players per team to decrease mechanical work. Drills 2: Tactical-oriented work such as directed games (the coach regularly stops the play to provide feedback to different player lines or different teams) or set pieces (for a TD of 3-4 km, no HSR and MW 20 a.u). Top up: additional 50-200m of HSR with low metabolic demands (HIIT Type 6 (6)) such as 2-4 x box-to-box runs within 12-15s interspersed with >30s of rest, with more repetitions for those not having performed above 19km/h at on the test.

Figure 3. Heart rate and locomotor load responses (with standard deviations) to the 7 pitch sessions of a first week microcycle in an elite academy. Non-pitch-based gym sessions were also programmed on some but not all days. The actual load of sessions 1-3 can be considered as low-to-moderate (low sRPE) in relation to typical in-season sessions (Table 1). The 30-15IFT was programmed on D4. The proportion of the session that arises from the 30-15IFT is shown by the pink arrows and circle. TD: total distance. HSR: high-speed running (>19.8 km/h), MW: mechanical work, sRPE: session rate of perceived exertion (0-10 scale). The main specific session contents are shown on the top of each day. SSG: small-sided games. Type 4 HIIT refers to the following HIIT Science terminology, and specifically to a sequence that involves a high contribution of both the aerobic and anaerobic (lactic) systems together with a strong neuromuscular load.

L’article Pre-season fitness testing in elite soccer: integrating the 30-15 Intermittent Fitness Test into the weekly microcycle est apparu en premier sur 30-15 IFT.

Here are below two selections of performances at the test across representative sports and playing standards for men and female athletes, respectively. What can be seen from the graph is that VIFT (the final velocity at the end of the test) tends to increase with age and playing standard, with the highest values recorded so far being those measured in national team players in soccer and field hockey for women, and AFL and national teams in field hockey and Rugby 7 for men. It is also important to see the spread of these data, confirming the fact that in team sport, even though it’s important to be fit, technique and tactic awareness are often of greater importance for success – and that players differing in fitness/VIFT performance can still preform in the same age group or at the same playing standard as their fitter teammates.

For more information on how to program high-intensity Intervall Training using the 30-15 IFT results, please visit HIIT Science !

L’article 30-15 IFT Performance across gender, age and playing standard est apparu en premier sur 30-15 IFT.

L’article The efficiency and versatility of the 30-15 Intermittent Fitness Test est apparu en premier sur 30-15 IFT.

• 20-yr review:  The 30-15 Intermittent Fitness Test – two decades of learnings
• 10-yr review: Buchheit – 30-15IFT – 10 yrs review (2000-2010)
• Variations in the protocol: Haydar-Assessing_COD_rec_with_30-15
• Pre-season fitness testing in elite soccer: integrating the 30-15 Intermittent Fitness Test into the weekly microcycle.
• Practical applications: Buchheit – 30-15IFT HotTopic NSCA
• Applications and training: Mosey – High-intensity interval training in youth soccer players – using fitness testing results practically

French

• 10 ans de pratique : Buchheit- 30-15IFT 10 ans (App HB 121-123 2011)
• Le 30-15IFT: M. Buchheit – Le 30-15 IFT – Approches du Handball M.  — Buchheit – le 30-15 IFT pour les adolescents (Revue EPS 321)
• Poster ACAPS 2005 – le 30-15 IFT
• La programmation de l’entrainement intermittent: M. Buchheit – Illustration de la programmation du travail intermittent Partie 1   —  M. Buchheit – Illustration… Partie 2 – Exemples d’intermittents courts
• Applications pratiques:  Haydar-Buchheit-Le 30–15IFT-pivot-12.09 – Copie
• Suivi de la performance en saison : M. Buchheit – Tests suivis en HB – Limoges 2007
• Relation 30-15IFt et RSA : M. Buchheit – Relation VIFT-RSA – Limoges 2007
• Variantes du test pour l’evaluation des qualites de recuperation et de changement de direction: Haydar-Buchheit-Le 30–15IFT-pivot-12.09 – Copie — Haydar-Assessing_COD_rec_with_30-15

L’article All 30-15IFT articles from the author in one post! est apparu en premier sur 30-15 IFT.

Full text here

PURPOSE: The aim of this study was to examine the reliability, validity and usefulness of the 30-15IFT in competitive female soccer players. METHODS: Seventeen elite female soccer players participated in the study. A within subject test-retest study design was utilized to assess the reliability of the 30-15 intermittent fitness test (IFT). Seven days prior to 30-15IFT, subjects performed a continuous aerobic running test (CT) under laboratory conditions to assess the criterion validity of the 30-15IFT. End running velocity (VCT and VIFT), peak heart rate (HRpeak) and maximal oxygen consumption (VO2max) were collected and/or estimated for both tests. RESULTS: VIFT (ICC = 0.91; CV = 1.8%), HRpeak (ICC = 0.94; CV = 1.2%), and VO2max (ICC = 0.94; CV = 1.6%) obtained from the 30-15IFT were all deemed highly reliable (p>0.05). Pearson product moment correlations between the CT and 30-15IFT for VO2max, HRpeak and end running velocity were large (r = 0.67, p=0.013), very large (r = 0.77, p=0.02) and large (r = 0.57, p=0.042), respectively. CONCLUSION: Current findings suggest that the 30 -15IFT is a valid and reliable intermittent aerobic fitness test of elite female soccer players. The findings have also provided practitioners with evidence to support the accurate detection of meaningful individual changes in VIFT of 0.5 km/h (1 stage) and HRpeak of 2 bpm. This information may assist coaches in monitoring ‘real’ aerobic fitness changes to better inform training of female intermittent team sport athletes. Lastly, coaches could use the 30-15IFT as a practical alternative to laboratory based assessments to assess and monitor intermittent aerobic fitness changes in their athletes.
Keywords: 30-15 intermittent fitness test, aerobic, cardiorespiratory fitness, intermittent activity, soccer, high intensity interval training.

L’article Reliability, validity and usefulness of 30-15 Intermittent Fitness Test in Female Soccer Players est apparu en premier sur 30-15 IFT.

L’article 30-15 Intermittent Fitness Test vs. Yo-Yo Intermittent Recovery Test Level 2 Relationship and Ability to Discriminate Performance Levels est apparu en premier sur 30-15 IFT.

L’article Preseason Training: The Effects of a 17-Day High-Intensity Shock Microcycle in Elite Tennis Players est apparu en premier sur 30-15 IFT.

Peso – 30-15IFT at 2800m altitude

@danippeso

L’article 30-15IFT TEST at 2800 meters above sea level in professional football players est apparu en premier sur 30-15 IFT.

thanks Vince Kelly @VinceKellySport for his support with the test

L’article Changes in the 30-15 intermittent fitness test after two weeks of high intensity pre-season training in elite rugby league players est apparu en premier sur 30-15 IFT.