How are your knees?

We’ve mentioned Reverse Sprint Intervals (RSI) before, but today got us thinking about them again, This extremely useful training really is perfect for anyone, no matter what season of life you’re in. Whether you’re chasing little kids around, moving your kids into college, keeping up with a busy career, we are all trying to stay strong and capable as long as we can.

Being able to move without pain matters so much to our quality of life. Our bodies change, but the goal stays the same: build and maintain the strength, mobility, balance, and endurance to keep doing the things we love. We’re always experimenting with different ways to make our health, fitness, and longevity routines more effective without making them overly complicated. RSI is one of those things that keeps coming back to us because it checks so many of the boxes we care about: short, efficient, functional, and focused on building a body that stays strong and capable over time.

It combines short bursts of sprinting with backward walking, giving you a surprisingly challenging workout without spending an hour doing traditional cardio. That’s exactly the kind of exercise we tend to gravitate toward. We’re not interested in spending endless hours on a treadmill just to check “cardio” off the list. We’d rather find movements that challenge us, build resilience, and have a purpose beyond simply burning calories. That’s what got us thinking about RSI again today.

Learn more about Reverse Sprint Intervals

Why Backward Walking?

One of the parts of RSI we’ve become especially interested in is walking backward. It sounds almost too simple, and maybe a little strange at first, but backward movement challenges your body in ways that forward walking doesn’t. It can help strengthen the muscles surrounding the knees, work on balance and coordination, and encourage mobility through a different range of motion.

This is something we’ve experienced firsthand through the ATG Coaching program, founded by Ben Patrick, the Knees Over Toes Guy.

Incorporating backward movement into our training has changed the way we think about knee health. It’s great movement that helps to build a body that will work well for decades. If you want to learn more, we recommend checking out Knees Over Toes Guy on YouTube. His approach has been a big influence on the way we think about strength, mobility, and longevity.

Supporting Your Body Along the Way

Of course, exercise is only one piece of the puzzle. When we’re asking our bodies to adapt to new training, we also want to make sure we’re giving them the nutritional support they need.

One thing we’ve incorporated into our routine is collagen, particularly because we’re interested in supporting healthy connective tissue, joints, and overall mobility as we age. We use and love Great Lakes Collagen.

We also pay attention to protein, minerals, hydration, and nutrient-dense foods overall. Putting together a collection of small habits supports the bigger picture of your overall health and longevity.

A Few Things We’ve Learned

If you’re interested in trying RSI, we’d recommend starting conservatively.
Warm up first. A few minutes of walking and dynamic movement can help prepare your body.
Start slower than you think you need to. Sprinting is demanding, and backward walking is a movement most people aren't accustomed to.

Pay attention to your surroundings. If you’re walking backward, make sure you have a clear, safe surface and something you can use as a visual reference if needed.
Don’t skip recovery. Your body gets stronger during the recovery and adaptation process, not just during the workout itself.

Build gradually. We’re much more interested in being able to train consistently for years than pushing too hard for two weeks.

Our approach to longevity includes health routines that are simpler, smarter, and more sustainable. We want to build strength and cardiovascular fitness, protect our mobility, keep our joints healthy, and maintain the ability to do the things we enjoy. Reverse Sprint Intervals are just one tool in that toolbox.

If you’ve tried RSI or incorporated the ATG approach into your training, we’d love to hear about it. Send us a message or tag us in your training posts. We’re always interested in what other people are doing to build a stronger, healthier, more capable body.

Until next time, be well!