I must admit, I'm abit of a gym rat myself.......and really enjoy boxing training (Bag work, floor work, shadow boxing, speedball and jump-rope).
But its not an ideal way of improving a 10K time.
The best way to bash your 10K time to the lower 50s would simply be to increase your weekly mileage. I wouldn't worry about speedwork/intervals yet, until you have developed a good running base.
I'd aim to start with a weekly diet of 15 easy/conversational paced miles......and to increase this by 10% each week till you are up to about 25 miles a week. Then you could start intervals/speedwork.
Maybe 6 x fast paced 1/4 miles with 3 mins rest between each would be a good start.
Even without the speedwork, I'd imagine that with a diet of 25 weekly miles you'd decimate your current 10K time.
Best of luck...