2 crunches-per-second pace, 1000 times, taking a 10-sec break to do "the worm" after every 100 reps to alleviate any back discomfort. On the last 200, crunch with your legs down for your lower abs. Between sets, wiggle your spine from your hips to your neck a couple of times to massage your vertebrae which will relieve any discomfort.
Wykonaj ten trening z najlepszym sprzętem do ćwiczeń. Zalecamy używanie monitora tętna na pasku do klatki piersiowej Bluetooth lub smartwatcha do optymalizacji treningu i śledzenia wyników.