@GEB56 posted:Primarily canoe and kayak racing for the last 13 years. We train often paddling fast and up to 20 km each time twice a week. Floor and light weight exercises including crunches. I walk 5 km a day and cycle sometimes. I am nearly 64.
Anything too extensive can cause bowel problems. I think the crunches are the culprit. A lot of people on here have gotten hernias and blockages from crunches/situps and weightlifting. I would back off on the crunches.
As for duration of exercise: I would do at least 30minutes but no more than 1hr at a time, especially with your age.
Is your stomach poking out around the umbilical area? Belly button turn into a outty???