I started running first week of January. Did a couch to 5k 'class' in my local town and stuck at it, haven't missed a run since week 1
I now run 5k three times a week and am amazed at myself!
My DH has a stressful job and gets zero exercise, has a really awful diet and in general seems quite unhealthy. He recently gave up smoking, which I'm delighted about, and last week bought a weighing scales. He's 17 stone. So last night he announced he was 'going for a run'. I was really pleased that he is going to tackle his weight/lack of exercise but ended up being really worried when I heard his 'plan'.
I suggested he download one of the hundreds of C25K apps for his iphone and use that, but he looked at me like I was mad and said "that's just for ladies" He intended to just leave the front door and run, no warm up walk etc. Then was asking me about the routes that I do, but again when I explained that there's a lot of hills and a 5k route on his first outing might not be the best move, he poo-pooed it and said that he'd 'wing it'
So he went out at 9:50pm - after laughing at my suggestion to wear a high-vis vest (he was dressed head to foot in navy, not one reflective strip on him) and came back 45 mins later unable to breathe
Said he'd ran most of the time "until he absolutely needed to walk". We had a heated discussion about the need to stretch afterwards, which he (of course) disagreed with, but reluctantly did actually do a few stretches in the end. Then announced that he plans to do this every night from now on. When I tried to explain about rest days in the early stages, he again dismissed it as not applicable to him 
How can I get him to see that he could really do himself an injury if he tries to do too much too soon? Is there a website or app that is more 'manly' ?? The ones I've looked at are specifically aimed at women. By the way, he's not particularly sexist, I just think he's feeling his age lately (42) and for some reason thinks he can just instantly go back to how he was 20 years ago but knowing deep down that he can't, and is feeling a bit embarrassed about it.