Hypermuscle

Hypermuscle activity, for whatever reason, can change this normal relationship. In the resting position, the intrarticular pressure is very low.

Source: wiktionary

Pain, swelling, leg pains, redness in joints, limited range of motion in joints, back pains, fractures easily or multifractures, lax joints, nails malformed, webbing of digits, hypermuscle or hypomuscle tone.

Source: wiktionary

[…] although his muscles do not match the hypermuscles of the big 1980s heroes like Sylvester Stallone and Arnold Schwarzenegger.

Source: wiktionary