Hour long is to long to workout?

Depends entirely on what you are after, muscle endurance? or muscle strength. If you want muscle endurance i recomend a longer workout, about 2-4 hours 3 times a week. How you do this is you take a light weight. say you have a 45 lb bench press bar. your max is 200 (max weight you can bench at least 1 rep.) you would stick 2x 35 lb weights on. do this like a normal bench press. but SLOW slowly resist down to ur chest. as soon as it hits your chest. pop it. push it up fast. that will shock train your muscles, extending endurance. if you want muscle strength, you will workout for about 1-2.5 hours 4-5 times a week, try to prevent doing the same exercise to days in a rown, it will weaken ur muscles. if you are looking to look toned and ripped, then run, run forest run. it tones your muscles, making them more defined.