Un-racking 110 percent of maximum for 10 seconds kept average bar speed from dropping on the next heavy single, where a light hold did not. Peak speed and muscle activity were unchanged, and it is one acute study.

A 2025 meta-analysis of 19 studies found supersets shortened sessions with similar repetitions, volume load and long-term strength and hypertrophy, at the cost of higher effort, lactate and energy cost.

Some early trials favoured daily undulating periodisation for strength, but a meta-analysis of 17 studies with 510 participants found no difference in effectiveness between linear and undulating models for upper- or lower-body strength.

Small studies, small effects, flexible analyses and vested interests all make a finding less likely to be true. Questionable research practices are documented in exercise science itself.

Research on powerlifters suggests a small number of heavy working sets each week can still produce strength gains, while single daily heavy singles helped some lifters and not others. Here is what the evidence supports and where it runs thin.

In well-trained male athletes, morning ballistic and heavy strength protocols improved jump height 6 hours later, but by 24 hours the gains were largely diminished. Here is what the delayed priming trials show and how far they transfer.

A 2026 meta-analysis found self-selected and fixed rest intervals produce comparable effects on performance in single sessions. Whether self-selected rest costs time depends on the fixed rest it is compared with.

An audit of the 20 most highly cited strength and conditioning meta-analyses found statistical errors in 85%. Other reviews report suboptimal reporting and methodological standards in physical activity and sports medicine meta-analyses.

In trained lifters over 8 weeks and untrained adults over 10 weeks, progressing repetitions at a fixed load produced strength and muscle gains similar to progressing the load.

Combining first-rep velocity with velocity loss across a set tracked fatigue closely in trained men. It is a promising monitoring tool, but the validation study tested only the squat and bench press.

In an analysis of sport, deliberate practice accounted for 18% of the variance in performance overall and only 1% among elite-level performers. Practice matters, but it explains a minority of the differences between athletes.

World-class distance runners do at least 80% of their running at low intensity. Trials in trained athletes favour a polarised approach, but in recreational runners a focused distribution produced similar improvements with less training time.

One eight-week trial in well-trained men found more fat loss with full-body sessions than a split at matched weekly sets. For muscle and strength, the pooled evidence shows no significant difference.

Pyramid sets built strength in the trials we read, and muscle in older women, but we found no evidence that they beat simpler loading, and in trained men heavier loading produced larger strength gains. Here is the evidence and its limits.

Two small trials from one research group found jump power rose after a heavy bench press protocol; a pilot study and a contralateral-limb trial found no such boost.

Low-load glute exercises before jumping raised jump power or height in two small studies, sprint results were mostly unchanged, and the one study that measured glute EMG found no change.

A meta-analysis of eighteen studies found trainees self-select loads equal to 53% of their one-repetition maximum on average. Here is what that means for strength and muscle, and who the data covers.

Across two monitoring studies, athletes' perceived effort and completed training differed from the coach's plan. Agreement was weakest for sessions intended to be easy, and in junior speed skaters those who approached or exceeded the plan reported more success and better recovery.

In an eight-week trial in trained basketball players, adding bands to squats improved squat jump more than constant-load squats; the countermovement jump difference was not significant.

A meta-analysis of thirty-four studies reported positive effects of weightlifting training on jump, sprint and squat strength, especially when combined with traditional resistance training. Here is how certain that is and who it covers.