hollywoodhalfmarathon.com
Core Exercise: Buck-o-five
21 Straight Leg Sit-ups
Start by doing straight leg sit-ups, as you reach muscle failure (or if it hurts your back) switch to crunches. Brace your feet if you need to.
21 Straight Leg Oblique Crunches (2 count exercise)
1 Min Plank
21 Reverse Crunches
21 Toe Touches
1 Min Right Side Plank
21 V-Ups
1 Min Left Side Plank
Max effort, 13 minutes.
http://youtu.be/wFElbNOzzrA
21 Straight Leg Sit-ups
Start by doing straight leg sit-ups, as you reach muscle failure (or if it hurts your back) switch to crunches. Brace your feet if you need to.
21 Straight Leg Oblique Crunches (2 count exercise)
1 Min Plank
21 Reverse Crunches
21 Toe Touches
1 Min Right Side Plank
21 V-Ups
1 Min Left Side Plank
Max effort, 13 minutes.
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