In untrained young adults, performing standing calf raises with the knee straight leads to significantly greater muscle growth in the calf muscles compared to seated calf raises with the knee bent,...

Pro

Against

Mechanism

Synthesis from 1 study

How it works

When the calf muscle is stretched while pushing up, it pulls harder on itself and builds up more waste, which tells the muscle to grow bigger. This only happens strongly when the knee is straight, not bent.

Most probable mechanism

In Simple Terms

When the calf muscle is stretched while contracting, it pulls harder on its fibers and builds up more waste products, which signals the muscle to grow bigger. This happens more when the knee is straight than when it's bent.

Causal chain

Knee extension during plantarflexion elongates the gastrocnemius muscle, increasing passive tension and sarcomere strain across its fibers

Supported by evidence

which leads to

Increased sarcomere strain activates mechanotransduction pathways involving integrins, focal adhesion kinase, and mTOR signaling in muscle cells

Indirect evidence only

which leads to

Greater muscle lengthening during contraction elevates metabolic stress through localized hypoxia and lactate accumulation, disrupting cellular homeostasis

Indirect evidence only

which leads to

Mechanical tension and metabolic stress trigger upregulation of anabolic signaling molecules, including IGF-1, and activate satellite cells to contribute nuclei to muscle fibers

Indirect evidence only

which leads to

Muscle protein synthesis exceeds degradation, resulting in net accretion of contractile proteins and increased muscle fiber cross-sectional area

Verified by multiple studies

Evidence from Studies

Supporting (1)

Community contributions welcome

Triceps surae muscle hypertrophy is greater after standing versus seated calf-raise training

Randomized Controlled Trial

Human

2023

Contradicting (0)

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Triceps surae muscle hypertrophy is greater after standing versus seated calf-raise training

Score: 60

DOI: 10.3389/fphys.2023.1272106

Similar Assertions

In untrained young adults, performing seated calf raises with the knee bent for 12 weeks leads to less than 1.7% increase in gastrocnemius muscle size, indicating that training biarticular muscles at short lengths produces minimal growth.

94%

Working your muscles while they are fully stretched builds more muscle than working them while they are shortened. This stretching advantage is especially noticeable in muscles that cross two joints, like the back of your lower leg, but doesn't seem to matter for muscles that only cross one joint.

92%

Doing calf raises while standing up with your knees straight builds more calf muscle than doing them while sitting down with your knees bent. Research shows that keeping your legs straight during the exercise leads to much bigger muscle growth over a few months.

88%

Doing calf raises with your knees straight builds more of your main calf muscle than doing them with your knees bent. This happens because keeping your knees straight puts the muscle in a better position to handle more tension and stretch, leading to bigger growth.

87%

Doing seated calf raises while keeping your knees bent (short muscle length) twice a week for three months won't really build up your calf muscles. Research indicates this specific method only leads to tiny, unnoticeable muscle growth.

87%