Cardio, light weight, high reps workout plan . . .

okay so this is the deal . . i've been bodybuilding for 3 years . . my main goal was to just get huge . . I did heavy weights, low reps . . i'm now focusing my training to boxing and mma . . so I want to do cardios, light weight and high reps . . cuz taking the same approach I have won't help me with fighting . . .

this is my workout plan so far . . 5 to 7 days a week . . .

30 to 45 minute run @ medium pace on the treadmill . . .
45 minutes to 1 hour of light weightlifting . . .
30 to 45 minutes swimmling laps . . .
eat . . .
1 hour to hour and a half of working the heavy bag, speed bag and duck n weave bag . . .

whatcha think about this? . . .

my question is . . when doing light weight, high reps . . should I work a particular body part a day? . . or should I do more of a circuit training . . how many sets? . . how many excersises? . . how many reps? . . .

thanks bros . . .

my goal is to get conditioned, gain stamina, increase speed, endurance, build my cardio tolerance up . . and also to get lean and cut . . .

I personally do not have a clue but have read through articles on www.Bodybuilding.com as well as briefly on the Militich website Tapout website etc.

Good Luck Though Bro..

Make sure to post your progress