Both types of training made athletes stronger and more powerful, but squats with both legs made them significantly more powerful in the squat than lunges did.

Scientific Claim

Six weeks of either unilateral or bilateral eccentric-overload training is associated with substantial improvements in lower-limb power output during both bilateral squat and unilateral lunge tasks in young male team sport athletes, with bilateral training showing a larger increase in bilateral power (+38.6%) than unilateral training (+18.6%).

Original Statement

“The BG increase POWER (+38.6%) substantially more than the other group.”

From study:The effects of unilateral and bilateral eccentric overload training on hypertrophy, muscle power and COD performance, and its determinants, in team sport players

Evidence Quality Assessment

Claim Status

overstated

Study Design Support

Design supports claim

Appropriate Language Strength

association

Can only show association/correlation

Assessment Explanation

The claim 'substantially more' implies causation and superiority, but without randomization, only associations can be inferred. The verb 'increased' is acceptable if framed as association.

Evidence from Studies

Supporting (1)

The effects of unilateral and bilateral eccentric overload training on hypertrophy, muscle power and COD performance, and its determinants, in team sport players

Randomized Controlled Trial

Human

2018

The study found that doing squats with extra resistance for six weeks made guys stronger in both legs at once much more than doing lunges did — exactly what the claim says.

Contradicting (0)

No contradicting evidence found

Source Study

The effects of unilateral and bilateral eccentric overload training on hypertrophy, muscle power and COD performance, and its determinants, in team sport players

Score: 46

DOI: 10.1371/journal.pone.0193841

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