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Never. Sit ups are dangerous. Instead, substitute other exercise (such as crunches or knee-ups) to work your abs. Working your midsection or core muscle groups should not normally be done more than twice weekly.
Answer
Doing a number of pushups correctly will also improve your abs as a nice side effect!
What else can I help you with?
Should you do sit ups and push ups before or after dinner?
after dinner
What is the average amount of sit ups a 11 year old boy should be able to do do?
I'd say about 40 to 50 sit ups.
How many sit ups should a fifteen year old be able to do in two minutes?
a fifteen year old should be able to do atleast 110 sit ups in two minutes.
How many sit ups should girls do to get a six pack?
1
How minutes do you should leave after eating and then sit ups?
60 minutes.
Why is your stomach getting bigger with sit ups?
Sit ups do not burn stomach fat. Sit ups build and tone stomach muscles.
How many sit ups do you do on ab rocket?
On the ab rocket you should do the amount of sit ups you need to until you reach you reach your limit ( your stomach starts cramping/ hurting)
How many sit ups should a 7 year old be able to do?
5
How do you do harder sit ups?
Twice a day, do sit-ups for three minutes. Overtime, you'll get better. I can do about 65 sit-ups per minute.
Which work out out of push ups sit ups and pull ups will affect the heart rate?
sit-ups raise your heart beat more
What does sit ups measure?
sit ups measure your stomach strength.
How many sit ups should you do a night if you want too lose weight?
5X20
