“Annie” is a tough combo of concentric and eccentric abdominal contractions during the 150 sit-ups performed and the static abdominal contraction held during the 150 double unders
Making moves on the benchmark board!
“Annie” is a tough combo of concentric and eccentric abdominal contractions during the 150 sit-ups performed and the static abdominal contraction held during the 150 double unders
Making moves on the benchmark board!