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PURPOSE: To examine the changes in biceps muscle thickness (MT), EI and isometric strength (ISO) before, immediately after, and 24, and 48 hours after 4 sets of biceps curls.

METHODS: 27 resistance trained individuals visited the laboratory 4 times. During visit 1, paperwork and maximum strength were measured. During visit 2 (2-7 days later) participant’s MT and ISO were measured in both arms before performing 4 sets of biceps curls in a randomized arm. Additional measures were taken immediately after exercise, as well as 24 and 48 hours after exercise. MT images were saved for EI measurement. Results are displayed as means (SD).

RESULTS: For MT there was an interaction (p< 0.001). MT increased from pre [2.88 (. 64) cm] to post [3.27 (. 67) cm] exercise and remained elevated above baseline 24 [2.92 (. 66) cm] and 48 [2.98 (. 68) cm] hours post. There were no changes for MT in the control group from …