Stock photo: Jackknife Crunch on Aerobic Step
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

#6592055 Jackknife Crunch on Aerobic Step by blanaru Stock photo blanaru

XXL JPG 5123 x 7310 pixels
17.1" x 24.4" | 43.4 cm x 62 cm @ 300dpi JPG
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