With every sport if you have bad form it will lead to injury. Let me address 2 of the non-impact sports you listed: 1. Swimming - if you have a bad stroke and

With every sport if you have bad form it will lead to injury. Let me address 2 of the non-impact sports you listed: 1. Swimming - if you have a bad stroke and immediately go on to do long yardage workouts you will hurt your shoulders. Working with a stroke coach and slowing down to focus on your form will do a lot to avoid shoulder issues. Alternate breathing mixed with some dry land work will help muscle imbalance issues too 2. Cycling is about fit and form. For i/t band issues if your position is incorrect and you do a lot of mileage you will have knee problems. Also doing some weight training can help. Get a proper fit from a bike shop that specializes in shoe/saddle fit as well. Adding some resistance training will also help You must work up to being competitive. Going out and doing 60m or 3000 yards on the first day will definitely lead to injury. Investing in a good coach here can help.