Proven in Practice

Sasha Schulz, Jeremy Meredith
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  • Fitness
  • Updated weekly

This is a show about fitness. How to train, how to recover, and how to perform your best. Both of us coaches. One having competed at the highest level, the other bringing a clinical eye to the equation. This is for athletes, coaches, clinicians and anyone who wants to better understand exercise science and how to apply it to improve fitness. Sasha Schulz Instagram - @drsasha_rx Website - rehab2rx.ca Jeremy Meredith instagram - @ascent_coach

Episodes

  1. Mobility

    5 Jun

    Mobility

    There's a lot more to mobility than stretches and smashing things with rollers and lacrosse balls This one has some strategies you can implement immediately to improve your mobility As you know, mobility is a very important component for improving movement economy and therefore performance It is also crucial for reducing injury risk Enjoy! Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947 Instagram - drsasha_rx Jeremy Instagram - ascent_coach

    53 min
  2. CNS Fatigue Applications

    30 May

    CNS Fatigue Applications

    If it's not CNS fatigue, what is it? And what should we do about it? We discuss the practical implications of the science we reviewed last week. How to set up programs to decrease the impact of performance fatigue or perceived fatigue. We also talk about other ways you can be tricked. Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947 Instagram - drsasha_rx Jeremy Instagram - ascent_coach

    1hr 5min
  3. CNS Fatigue

    23 May

    CNS Fatigue

    you get it from heavy deadlifts right? Think again. This week we dive deep into the research on central nervous system fatigue, and fatigue in general. What is it, how it is measured, what causes it, and how long it takes to recover. This one will probably surprise you. Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947 Instagram - drsasha_rx Jeremy Instagram - ascent_coach References Taylor JL, Gandevia SC. A comparison of central aspects of fatigue in submaximal and maximal voluntary contractions. J Appl Physiol (1985). 2008 Feb;104(2):542-50. doi: 10.1152/japplphysiol.01053.2007. Epub 2007 Nov 21. PMID: 18032577. Barnes MJ, Miller A, Reeve D, Stewart RJC. Acute Neuromuscular and Endocrine Responses to Two Different Compound Exercises: Squat vs. Deadlift. J Strength Cond Res. 2019 Sep;33(9):2381-2387. doi: 10.1519/JSC.0000000000002140. PMID: 28704311. Amann M, Sidhu SK, Weavil JC, Mangum TS, Venturelli M. Autonomic responses to exercise: group III/IV muscle afferents and fatigue. Auton Neurosci. 2015 Mar;188:19-23. doi: 10.1016/j.autneu.2014.10.018. Epub 2014 Oct 23. PMID: 25458423; PMCID: PMC4336599. Márquez G, González-Hernandez J, Jiménez-Reyes P, Colomer-Poveda D, Boullosa D. Co-existence of peripheral fatigue of the knee extensors and jump potentiation after an incremental running test to exhaustion in endurance trained male runners. Front Sports Act Living. 2023 Nov 9;5:1267593. doi: 10.3389/fspor.2023.1267593. PMID: 38022781; PMCID: PMC10670794. Bigliassi M (2015) Corollary discharges and fatigue-related symptoms: the role of attentional focus. Front. Psychol. 6:1002. doi: 10.3389/fpsyg.2015.01002 Behrens M, Gube M, Chaabene H, Prieske O, Zenon A, Broscheid KC, Schega L, Husmann F, Weippert M. Fatigue and Human Performance: An Updated Framework. Sports Med. 2023 Jan;53(1):7-31. doi: 10.1007/s40279-022-01748-2. Epub 2022 Oct 18. PMID: 36258141; PMCID: PMC9807493. Noakes TD (2012) Fatigue is a Brain-Derived Emotion that Regulates the Exercise Behavior to Ensure the Protection of Whole Body Homeostasis. Front. Physio. 3:82. doi: 10.3389/fphys.2012.00082 Amann, M., Blain, G. M., Proctor, L. T., Sebranek, J. J., Pegelow, D. F., & Dempsey, J. A. (2011). Implications of group III and IV muscle afferents for high-intensity endurance exercise performance in humans. The Journal of physiology, 589(Pt 21), 5299–5309. https://doi.org/10.1113/jphysiol.2011.213769 Marcora SM, Staiano W, Manning V. Mental fatigue impairs physical performance in humans. J Appl Physiol (1985). 2009 Mar;106(3):857-64. doi: 10.1152/japplphysiol.91324.2008. Epub 2009 Jan 8. PMID: 19131473. More references available upon request

    49 min
  4. Not So Rapid Fire #1

    16 May

    Not So Rapid Fire #1

    Peptides, Warm ups, What is CrossFit? Lots of interesting discussion today And a little teaser for the next episode at the end, so stay tuned. Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947 Instagram - drsasha_rx Jeremy Instagram - ascent_coach

    1hr 38min
  5. Skill Acquisition

    24 Apr

    Skill Acquisition

    We dive into lots of cool details about how people learn and develop skills Lots of great information for coaches in here - implicit vs explicit instruction, internal vs. external cues, incorporating sensory information with verbal information Some gems for athletes too about how to develop skills efficiently, and common mistakes to avoid Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performa... Instagram - drsasha_rx Jeremy Instagram - ascent_coach References Deliberate practice in Sport Ford, Paul & Coughlan, Edward & Hodges, Nicola & Williams, Andrew. (2016). Deliberate practice in sport. 10.13140/RG.2.1.2442.9042. Skill Acquisition for Phys Ed (Cognitive and Ecological Dynamics) Alali, N. N., Carson, H. J., & Collins, D. (2024). A Pragmatic Approach to Skill Acquisition for Physical Education: Considering Cognitive and Ecological Dynamics Perspectives. Quest, 76(2), 227–246. https://doi.org/10.1080/00336297.2023.2298931 Critical Appraisal of Ecological Dynamics Collins, D., Carson, H.J., Rylander, P. et al. Ecological Dynamics as an Accurate and Parsimonious Contributor to Applied Practice: A Critical Appraisal. Sports Med 55, 799–810 (2025). https://doi.org/10.1007/s40279-024-02161-7

    1hr 3min
  6. Blood Flow Restriction (BFR) Training

    17 Apr

    Blood Flow Restriction (BFR) Training

    What is BFR training and what does it do? It is a no brainer during injury rehab, but you might be surprised by some of the results on healthy individuals and competitive athletes. Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performa... Instagram - drsasha_rx Jeremy Instagram - ascent_coach References Narrative review Davids CJ, Roberts LA, Bjørnsen T, Peake JM, Coombes JS, Raastad T. Where Does Blood Flow Restriction Fit in the Toolbox of Athletic Development? A Narrative Review of the Proposed Mechanisms and Potential Applications. Sports Med. 2023 Nov;53(11):2077-2093. doi: 10.1007/s40279-023-01900-6. Epub 2023 Aug 14. PMID: 37578669; PMCID: PMC10587223. Rowing Study Thompson KMA, Pethick WA, Clarke J, Winegarden A, Johnson E, Coates AM, Stellingwerff T, Burr JF. Blood Flow-Restricted Training and Time Trial Performance: A Cohort Study of World-Class Rowers. Med Sci Sports Exerc. 2024 Sep 1;56(9):1606-1614. doi: 10.1249/MSS.0000000000003459. Epub 2024 Apr 16. PMID: 38619968. BFR and walking Abe T, Kearns CF, Sato Y. Muscle size and strength are increased following walk training with restricted venous blood flow from the leg muscle, Kaatsu-walk training. J Appl Physiol (1985). 2006 May;100(5):1460-6. doi: 10.1152/japplphysiol.01267.2005. Epub 2005 Dec 8. Erratum in: J Appl Physiol. 2008 Apr;104(4):1255. PMID: 16339340. Effects on proximal muscles Pavlou K, Korakakis V, Whiteley R, Karagiannis C, Ploutarchou G, Savva C. The effects of upper body blood flow restriction training on muscles located proximal to the applied occlusive pressure: A systematic review with meta-analysis. PLoS One. 2023 Mar 23;18(3):e0283309. doi: 10.1371/journal.pone.0283309. PMID: 36952451; PMCID: PMC10035935. BFR and detraining Teixeira, Emerson L.1,2; de Salles Painelli, Vitor1,2; Silva-Batista, Carla2,3; de Souza Barros, Talita1; Longo, Ariel R.1; Lasevicius, Thiago2; Schoenfeld, Brad J.4; Aihara, André Y.5; de Almeida Peres, Bergson1. Blood Flow Restriction Does Not Attenuate Short-Term Detraining-Induced Muscle Size and Strength Losses After Resistance Training With Blood Flow Restriction. Journal of Strength and Conditioning Research 35(8):p 2082-2088, August 2021. | DOI: 10.1519/JSC.0000000000003148

    54 min
  7. The Art and Science of Coaching: Part 2

    3 Apr

    The Art and Science of Coaching: Part 2

    The Art of Coaching How to create and manage the program given the baseline metrics Training prioritization and microcycle organization Different communication styles and motivational techniques Case examples Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947 Instagram - drsasha_rx Jeremy Instagram - ascent_coach

    1hr 10min
  8. The Art and Science of Coaching: Part 1

    27 Mar

    The Art and Science of Coaching: Part 1

    Part 1 - Science of coaching Basic metrics to test and track for a functional fitness athlete How the different strength and endurance measures relate to each other and to performance in general How to use the metrics to inform prioritization in training Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947/about Instagram - drsasha_rx Jeremy Instagram - ascent_coach

    59 min
  9. Zone 2 Training for CrossFit

    20 Mar

    Zone 2 Training for CrossFit

    We provide a simple framework to decide why and how to program zone two training for a CrossFit/functional fitness athletes. Jeremy also gives an alternative to traditional zone 2 cardio. References: Li Y, Zhao W, Yang Q. Effects of high-intensity interval training and moderate-intensity continuous training on mitochondrial dynamics in human skeletal muscle. Front Physiol. 2025 Apr 17;16:1554222. doi: 10.3389/fphys.2025.1554222. PMID: 40313872; PMCID: PMC12043657. MacInnis MJ, Zacharewicz E, Martin BJ, Haikalis ME, Skelly LE, Tarnopolsky MA, Murphy RM, Gibala MJ. Superior mitochondrial adaptations in human skeletal muscle after interval compared to continuous single-leg cycling matched for total work. J Physiol. 2017 May 1;595(9):2955-2968. doi: 10.1113/JP272570. Epub 2016 Aug 3. PMID: 27396440; PMCID: PMC5407978 Hickson RC, Bomze HA, Holloszy JO. Linear increase in aerobic power induced by a strenuous program of endurance exercise. J Appl Physiol Respir Environ Exerc Physiol. 1977 Mar;42(3):372-6. doi: 10.1152/jappl.1977.42.3.372. PMID: 838658. Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947/about Instagram - drsasha_rx Jeremy Instagram - ascent_coach

    1hr 11min
  10. Movement Economy in CrossFit

    13 Mar

    Movement Economy in CrossFit

    What is movement economy? The components that contribute to improved economy for CrossFit/functional fitness How all of this relates to injury risk The world record for most consecutive double unders Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947/about Instagram - drsasha_rx Jeremy Instagram - ascent_coach

    1hr 2min
  11. Programming to Make Quarter Finals, Semifinals and Beyond

    6 Mar

    Programming to Make Quarter Finals, Semifinals and Beyond

    General programming recommendations and recovery strategies for CrossFit athletes trying to make quarterfinals and semifinals. Comments on a recent instagram post by Adrian Conway (below) about how training tolerance changes with experience and advancement. https://www.instagram.com/p/DVLzR1aDlHh/?img_index=1 Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947/about Instagram - drsasha_rx Jeremy Instagram - ascent_coach

    1hr 3min
  12. 2026 CrossFit Season - Predictions and Preparation

    28 Feb

    2026 CrossFit Season - Predictions and Preparation

    Predictions for CrossFit Open 2026 Comparing athlete capabilities at each level of CrossFit season How to prepare in general and how to peak/taper for different stages of the CrossFit season Predictions for Quarter and Semifinals events Variables to track and general recommendations for injury prevention Shoulder stability and neck isolation training (handstand pushups safety) Sasha website - www.rehab2rx.ca Skool - https://www.skool.com/hybrid-performance-rehab-1947/about Instagram - drsasha_rx Jeremy Instagram - ascent_coach

    46 min
  • 12 Episodes

About

This is a show about fitness. How to train, how to recover, and how to perform your best. Both of us coaches. One having competed at the highest level, the other bringing a clinical eye to the equation. This is for athletes, coaches, clinicians and anyone who wants to better understand exercise science and how to apply it to improve fitness. Sasha Schulz Instagram - @drsasha_rx Website - rehab2rx.ca Jeremy Meredith instagram - @ascent_coach

Information

  • Creator
    Sasha Schulz, Jeremy Meredith
  • Years Active
    2k
  • Episodes
    12
  • Rating
    Explicit
  • Copyright
    © Rehab2Rx
  • Show Website
    Proven in Practice