Training ideas to acheive your goals
Wbell, I would suggest something like Tabata interval training to start with.
Dont think you are limited to sprints, you can do any bodyweight/weighted exercise as long as you can do max intensity. Bodyweight would be ideal for martial arts.
Do 20 sec max effort of say for example, burpees, then rest 10 seconds. You can continue with the same exercise, or change to a different one each time, say burpees, rest, squats, rest, push ups, rest.......
Do this for 4 mins total. This is one work set.
Once you get better, you can do this for 2 or 3 work sets.
Tabatas are really effective at improving your GPP, so you have more gas in the tank, better cardio endurance and muscle endurance. They are one of the best things out there for increasing your lactic acid threshold, which will make a big difference to you.
Of course you can do circuits to mirror fight rounds in length and so on, but these are quick simple and effective.
One thing that might help is to have an interval timer - I'm not here to advertise, but I use a GYMBOSS, which was cheap and easy to find. Ross enamait recommends them and it has been a godsend. Any interval timer that you can pick up for a low price will be fine, regardless of brand! It just means you arent reliant upon someone else to stand there with a stop watch!
Another variation is to do a tabata, but with punch out drills, for example, on the heavy bag. Punch as hard and fast as you can for 20 secs, then rest 10.... You get the idea - this is a great one and is an absolute killer.
These will burn off the fat and get you in fighting shape no problems.
If you are lifting a few time a week in addition, go for explosive power and strength, so stick to compound moves and use heavy weights. To begin with 5 reps X 5 sets HEAVY would be a good start. After about a month on constantly and gradually progressing, you can then shift to an explosive phase, working on same reps X sets, but at 70-80% 1 rep max, lifting as fast and as explosively as possible.
Always stretch dynamically before you do any type of training and then when really warm and loose at the end of the session, you can do some static stretches. I'd avoid static stretches on your hamstrings though, as its always better to stretch these dynamically, regardless of whether pre/post workout.
I mentioned Ross Enamait earlier - his training ideas are fantastic for anyone in MMA, so I'd suggest you check out his site [url]www.rossboxing.com[/url]
There are lots of free articles on the site that offer sound advice.