Sometimes, the best exercise equipment has been sitting untouched in our garages since peewee football days. One such tool: the agility ladder.

Despite its reputation as a prop from P.E., the agility ladder provides the perfect framework for an outdoor workout that will challenge your legs and your lungs. Plus, you can easily take it on-the-go for an outdoor workout.

Just lay out an agility ladder — also called a speed ladder — and try these nine different drills (yes, nine; it really is that versatile!). Follow the step-by-step descriptions and demo videos one by one, or put them all together into one fiery agility ladder workout.

Try to minimize the amount of time your feet are in contact with the ground — stay on the balls of your feet and avoid heel contact with the ground.

Pump those arms! You'll move faster through the ladder while remaining balanced. Just like the linear run, stay on your toes and minimize contact with the ground.

Engage your core. When hopping on one leg, your spine can become vulnerable if it isn't protected by your abs. Think about pulling your bellybutton to your spine.

Use your arms to keep your balance and maintain your speed. Bend your elbows so your arms are at a right angle by your sides, and pump them in unison with your steps.

Don’t worry too much about reaching full depth on the squat. While squatting until your thighs are parallel with the ground (or below) with good form is ideal, the focus here is on speed and coordination. Modify to quarter or half squats if you need to.

You can mix and match these agility ladder drills however you want based on your goal for the workout and how much time you have. Here are three options you can try.

Tabata is a type of high-intensity interval training that involves 20-second blasts of work followed by 10 seconds of rest. Repeat that scheme for four minutes, or until you've completed eight working sets.

To Tabata-ize agility ladder drills, perform each movement for a full 4-minute set. Start with four of the movements above for a quick 16-minute workout and build up to including all nine in a 36-minute session.

For a more traditional interval-style workout, perform each movement for 1 minute and rest for 1 minute. When your rest period is up, continue with the next movement. With nine drills, this would give you an 18-minute workout. Build up to cycling through twice for a 36-minute workout.

An AMRAP, or "as many rounds/reps as possible," involves choosing a timeframe — 10, 15, 20 or 30 minutes — and going through all nine moves as many times as you can before your time runs out. For an agility ladder AMRAP, consider two lengths of the ladder (there and back) as one rep.