I am learning to front crawl for the first time and I am swimming very poorly. I can only swim for about a minute straight. I'm not sure if this is because I am really out of shape or because my form is poor. Someone is teaching me so my form is improving, but I guess that is beside the point.
Is swimming poorly and getting out of breath due to poor breathing good cardio? My heart rate would bounce around from 90-160 and average around 130 for 30 minutes. You can imagine me swimming for a minute and taking one minute rest and going again.
Alternatively I could just hold onto a bar and kick for 30 minutes straight with a heart rate around 130. Would this be much better cardiovascular exercise? Heart rate would be the same on average with less variability and better breathing.
I'm concerned that my poor technique and breathing means my increased heart rate is due to being out of breath rather than a good workout.