18 июл. 2013 г. · They are only bad for your back if you have a weak core. The core is very important.

17 дек. 2020 г. · Also, doing them routinely can strain the lower back because of the rounded posture. Not the worst thing in the world, but there's much better ( ...

29 июн. 2015 г. · Whereas sit ups and crunches provide very little core stimulus and can be bad for your back and spine, the L-sit strengthens your entire upper ...

2 июн. 2016 г. · No. Like u/StuWard pointed out it has been shown that repeated spinal flexion can cause injury. But in a good beneficial Sit-Up you don't have ...

3 дек. 2021 г. · Crunches aren't the best, better off doing planks and such to build your core, which will actually help stabilize and protect your back.

6 февр. 2018 г. · The problem with crunches is that they develop into sit ups, which applies a lot of strain to the lower back. Crunches themselves aren't ...

4 июл. 2016 г. · Crunches hurt your back more than situps because you are breaking your back alignment. In sit ups, you should keep a straight back all the way ...

19 нояб. 2016 г. · I've heard that crunches are bad in the long term since they can do a number in your spine. What about cable crunches?

25 июн. 2016 г. · I think your core is probably not strong enough for decline crunches. Your lower back is overcompensating and over-engaging. I had a similar ...

17 июл. 2017 г. · You can train core daily, if all you are doing is crunches you will get bored and the repetition may eventually harm your back. Having a ...