People keep coming back to this. To me, there's an obvious answer, if he is in fact dealing with this injury as proposed.
I remember when I was younger, no matter what I was doing, I didn't necessarily know what I was doing. However, I was in much better shape and had a helluva lot of muscles to throw at any situation necessary.
Now, my eventual wife--well--she was young too. And, you see, she had this reoccurring situation. Now, I threw myself at that situation with vigor and gusto. However, didn't have a real clear understanding of my own physical limitations. So I remember this one time, while particularly energized, I maybe forgot to hydrate and my right quad seized. However, I was motivated to finish what I started, so shifted to my left side until it seized too. But, no pain, no gain. So I just pushed through until the job was finished. A good 20 minutes later. By that time, I'd done enough damage to my right quad I was put out of commission for a month. Which, thinking about it, is 4 weeks.
What could a man be doing on his day off that would motivate him to keep exercising through one pulled muscle to pull another? Come on, y'all. Only the one thing I can think of that provides that level of motivation.