Guilherme Pussieldi, PhD 🇧🇷

Sport Scientist, Professor at Federal University of Viçosa, High Performance Cycling Coach, Sport Manager, Sport Developer, Cycling Coach (BMX, MTB, Track).

[Hamish Ferguson PhD @CoachFergie]

Time-resolved energy-share reconstruction of individual glycolytic flux kinetics reveals duration-dependent bias in elite sprint cycling

https://t.co/ojPo9PWFuF

[Brad Schoenfeld, PhD @BradSchoenfeld]

How does muscle growth actually progress over time?

Our new systematic review and meta-analysis, posted as a preprint (DOI:10.51224/SportRxiv.910), pooled 3,237 observations from 480 studies to model the trajectory of resistance training-induced muscle growth.

As expected, muscle growth follows a curvilinear trajectory.

Gains occur relatively rapidly during the early stages of training and then progressively slow as training continues. At 10 weeks, the model estimated an average increase in muscle size of approximately 7%. This increased to ~7.5% at 12 weeks, ~8.9% at 20 weeks, ~10.5% at 36 weeks, and ~12.6% at 78 weeks.

In other words, hypertrophy displays diminishing returns—but diminishing returns do not mean no returns. Gains continue to accumulate; they simply become progressively smaller over time.

Importantly, there was substantial variability around these averages. At 10 weeks, for example, the 95% prediction interval ranged from approximately −7% to +22%, highlighting just how much hypertrophic responses can differ across studies and individuals. Moreover, most of the included studies were relatively short in duration, limiting our ability to draw conclusions about the rate of hypertrophy over longer training periods (above ~16 weeks).

Perhaps more importantly, research studies are generally designed to determine group-level effects rather than to optimize muscle development for each individual. Thus, these findings provide a useful framework for understanding the general trajectory of hypertrophy over time, but should not be interpreted as defining the limits of what a person can achieve with a customized, well-designed training program.

Take-home: Muscle growth tends to occur most rapidly during the early stages of resistance training, with the rate of gain progressively slowing as training exposure accumulates. However, diminishing returns do not mean an end to progress, and early rates of growth should not be extrapolated linearly over the long term.

Shout out to @BM_Roberts_SkM for spearheading the project 💪

https://t.co/q6Tirlwf31

[Daniel Berglind, PhD @DanielBerglind]

European youth are becoming less fit.
📉 Data from 417,362 children (1965–2023) show long-term declines in strength, flexibility and body composition, with cardiorespiratory fitness declining since the 1980s. 💪

https://t.co/3ZWl3XzNqH

[Daniel Berglind, PhD @DanielBerglind]

Protein supplements are not necessary for young athletes—but can be convenient
Most can meet protein needs through food alone
Protein powder is simply a practical protein source, not something “anabolic” or magical
Food first; supplements if useful

https://t.co/gha78lHtTt

[Guilherme Pussieldi, PhD 🇧🇷 @GPussieldi]

@BlueSpotScience Congratulations

[Hamish Ferguson PhD @CoachFergie]

Physiological and Placebo Effects of Beetroot Juice in Virtual Cycling Using the Balanced Placebo Design

https://t.co/8O1Xtd0uZa

[Daniel Berglind, PhD @DanielBerglind]

Strong core = better performance. 💪

Meta-analysis: trunk training improves strength, power, sprinting, agility & sport-specific performance. 🔥

Train the core. Transfer the power.

https://t.co/sbZmv6pSsu

[Int'l Journal of Sports Physiology and Performance @IJSPPjournal]

Now available ahead of print: Menstrual Cycle Effects on Performance Parameters in Female Football Players: A Systematic Review, by Kristine D. Rasmussen, Mette S. Bisgaard, and Mette Hansen.
https://t.co/6Rj91JL5uL

[Daniel Berglind, PhD @DanielBerglind]

🚣 100-m rowing is not simply “cardio.”
At maximal effort, it places a large demand on anaerobic power + rapid force production across repeated strokes
Strength + power training can therefore complement sprint-specific rowing.
100m 🚣 program:

https://t.co/Q2GSwCTtj9

[Hamish Ferguson PhD @CoachFergie]

Cycling Cleat Positioning Influences Achilles Tendon Strains, but at What Energetic Cost?

https://t.co/eoy9JaBVZ8?

[Hamish Ferguson PhD @CoachFergie]

Menstrual cycle phases affect recovery more than performance in trained cyclists

https://t.co/3ZVJvdw59i

[Daniel Berglind, PhD @DanielBerglind]

Deep squats produced greater strength and performance gains—and less pain—than half squats after 10 weeks of training.
For healthy individuals, depth isn’t the enemy; poor technique and inappropriate loading are.

https://t.co/NwjUkXKWhZ

[Martín @DelRealMartin2]

Delaying task failure in high-intensity exercise: a Pi-afferent-effort framework for targeted sports nutrition

https://t.co/evMaIRat84

[Rodrigo Zacca @RodrigoZacca]

Maximal aerobic speed: methodological implications and unintended consequences. Beltrami et al. Eur J Appl Physiol (2026). https://t.co/mrqeqD3RJ4 @EJAP_official

[Daniel Berglind, PhD @DanielBerglind]

Resistance training may improve sprint and endurance performance in masters athletes (>30 yrs), but evidence is still limited (4 studies, n=46). It should complement—not replace—sport-specific training.

https://t.co/8sHBSQvJap

[Daniel Berglind, PhD @DanielBerglind]

🏃‍♀️ Elite sprinters don’t train to get tired—they train to get faster
Evidence supports high-quality sprinting, progressive overload, individualization, and recovery over simply doing more
🧬 Genetics matter, but key performance factors are trainable

https://t.co/qkaIwH4C94

[Daniel Berglind, PhD @DanielBerglind]

Higher training loads are not inherently associated with greater injury risk.
The key is progressive adaptation. Athletes who gradually build their chronic training capacity appear more resilient, whereas rapid spikes in load increase injury risk.

https://t.co/HT69PnELkB

[Daniel Berglind, PhD @DanielBerglind]

Strength training principles are fundamentally the same for women and men: progressive overload, specificity, recovery, and individualization.
👧 Program for the athlete—not the stereotype.

https://t.co/3NPGqzDP13

[Paul Hough @the_hough]

Exercise-Based Strategies from Warm-Up to Training: A Systematic Review of Performance Enhancement and Injury Prevention https://t.co/9W5U57KSfY

[Hamish Ferguson PhD @CoachFergie]

A biomechanical and physiological comparison of standard and mini-bike cycle ergometry

https://t.co/zBb13c05uC