Weighted Bag Gloves?

[AdamGB]

Purely in terms of muscular endurance, the best way to look at it is like this:

I'm a pretty decent runner, I normally do shortish runs... 4 miles or so (the odd 6 miler here or there), during these runs I do a lot of hill sprints. Sprinting and punching are both plyometric activitys. Sprinting up a hill means your muscles have to work harder against the resistance of the hill, same as adding weight to a punch.

I'm very good at sprinting and just running up hills in general... I've ran 3 half marathons. The way I run (the hill's resistance and intensity) has made me Aerobically and Anaerobically very fit but the first two times I ran a half marathon I struggled in the last 3-4 miles to run...

I didn't struggle because my cardiovascular system was fatigued... that was easy. It got to the point where my hamstrings were so muscularly fatigued that I could barely flex my knees, I could feel the fibres beginning to tear.

I did the same run again a year later... inbetween that time I'd been doing my usual style of running, I'd been ranning faster and up steaper hills (ie: more resistance) and guess what happened when I ran - my muscles didn't have the endurance to work for that long and the same thing happened, I spent the last 3 or so miles running with nearly straight legs.

the THIRD time I did it though I did my usual running like I normally do (because it's relevant to boxing and I'm a boxer, not a long distance runner... just run them for fun/charity) the only differences was that this time amongst my normal road work I threw in a few 8-9 mile runs.

I pissed it (granted my legs were pretty sore the next day, though nowhere near as much as the other two- they always are when you've ran 13.5 miles!) but during the race my legs felt fresh the whole way... if I'd ran the last 3/4 of a mile any faster I would have been sprinting.

The problem the other two times was a lack of muscular endurance in the relevant muscles, even though the intensity and resistance of my interval running had increase, my muscular endurance hadn't - until I simply increased the duration that I ran at or tried to run at my 5-6 mile pace for.