Stock photo: Step by step instructions: Sit on step. Lean back and place hands on side of aerobic step. (A) Simultaneously bring knees toward chest and crunch the abs. (B)
Stock photo
#6592055Jackknife Crunch on Aerobic Step by
blanaru
XXL
JPG 5123 x 7310 pixels
17.1" x 24.4" | 43.4 cm x 62 cm @ 300dpi JPG