Re: Crunches and sit-ups
When you're doing crunches and sit ups, pay really close attention to keeping your back completely flat to the floor at all times. If you arch your back while doing them, it can cause strained muscles.
Re: Crunches and sit-ups
When you're doing crunches and sit ups, pay really close attention to keeping your back completely flat to the floor at all times. If you arch your back while doing them, it can cause strained muscles.