We examined the oxygenation and blood supply of three quadriceps muscles [vastus lateralis (VL), vastus medialis (VM), and rectus femoris (RF)] during the descent (eccentric) and ascent (concentric) phases of squatting exercise in eighteen young resistance-trained males.

We monitored the oxygenation and blood supply in three quadriceps muscles (vastus lateralis, vastus medialis, and rectus femoris) during squatting exercise to exhaustion.