If you live in a cold-weather state, you're all-too familiar with how winter can screw up your workouts. Unless you feel like pulling your best Rocky impersonation by working out in Arctic-like conditions, your workouts will be restricted to indoors.
For weight training, this doesn't present too much of a problem. And if you have access to turf, you can still do pretty much everything else indoors.
Otherwise, you're facing a conundrum when you want to do your conditioning work. Your choices are a treadmill, and, if you're lucky, an Airdyne bike.
We're not going to lie. Long treadmill runs suck. Some people love them, and that's fine. But if you're a competitive athlete accustomed to working at a high intensity, long runs on a treadmill will seem pretty boring. And they won't really help you get better at your sport.
Instead, we recommend the following treadmill workouts. They are intense. You will work at a high speed, and the result should be improved conditioning in less time. They are also a good option if you're trying to shed extra weight.