Medial gastrocnemius muscle fascicle behavior was assessed during repetitive heel-rise exercises with varying tempo (0,5 Hz and 0,83 Hz) and load from 13 participants (6 females, 7 males). Their mean age was 27 years, height 174 cm and weight 69 kg. Ultrasound videos were captured using Logicscan 128 (Telemed Ltd.) device with LV7.5/60/96Z transducer with 6MHz scanning frequency and sampling frequency of 80 frames per second. Videos are in avi format. During heel-rise exercises, the load was varied by exercising with one or two legs and adding extra 10%, 30%, or 40% of body weight. Filenames contain this information the first number referring to tempo (30 or 50), LEG for single leg, BW for double leg and the last numbers (if any) refer to added extra load (10, 30 or 40). Thus, 01_30BW.avi refers to participant 01 when performing heel rises with two legs and body weight only with the slower pace. MSc thesis by Emma Niemi has been published based on the data: https://jyx.jyu.fi/bitstream/handle/123456789/66588/URN%3aNBN%3afi%3ajyu-201912025076.pdf?sequence=1&isAllowed=y Dataset owners are: Taija Finni Juutinen, Emma Niemi and Glen Lichtwark

2025