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Indoor Sport Services Training Guide
Our Indoor Rowing Training Guide is the ultimate training resource for the Indoor Rower.
Written by top education and coaching specialists, it includes information on technique and training,
with programmes on cross-training, 2,000m and marathon race training, weight management and keep fit.
There are guest chapters written by top names such as Jurgen Grobler and Chris Shambrook as well as
dedicated sections on psychology, nutrition and weight training.
Weight Training - Jack-knife Crunch
<< Clean and PressBench Pull >>
Exercise 10 - Jack-knife Crunch
Excellent abdominal exercise involving the inferior rectus abdominus.
Method: Lie flat on your back on a flat surface with your arms stretched overhead. Raise your legs, trunk and arms simultaneously to balance on your hips, bringing your arms forward as though attempting to grasp your ankles. Return in a controlled way to the start position to avoid injury.
