After finishing a marathon last year, I found myself facing an unexpected hurdle—knee pain and a noticeable slowdown in my running pace. Like many who hit a wall, I took a break, hoping rest would suffice. But as the months rolled on, I realized that stopping was not the answer. It was time to improve, not only my knee condition but my overall health, energy, and running performance.
Enter High Intensity Interval Training, or HIIT—a fitness approach I embraced over the past two months that has transformed my journey.
What is High Intensity Interval Training?
HIIT is a method of exercise involving alternating bursts of intense activity with periods of rest or lower-intensity movement. This pattern allows you to push hard for a short time and then recover before the next burst. In my case, I used running as my exercise mode, switching between sprints and jogs.
Here’s a snapshot of my HIIT routine:
- 5 minutes warm-up jog
- 1 minute intense running (sprinting)
- 1 minute slow jogging
- Repeat the intense-slow cycle multiple times
- 5 minutes cool down jog
I aimed for a total of 30 minutes, three times a week (Monday, Wednesday, and Friday). This structure is simple to remember but flexible enough that anyone can adjust it to their fitness level. For newcomers, the intense running can be replaced by jogging, and the slow running by walking—a bit like the couch-to-5K method but focused on interval training.
Why HIIT?
HIIT offers several notable benefits:
-
Burns More Calories, Faster: The bursts of intense effort crank up the metabolism, allowing you to burn more calories in less time compared to steady-state cardio.
-
Increases VO2 Max: This is a measure of how much oxygen your body can utilize during exercise. Higher VO2 max equates to better endurance and energy efficiency.
-
Post-Exercise Calorie Burn: Studies suggest that HIIT can increase calorie burning even after the workout ends through a process called excess post-exercise oxygen consumption (EPOC).
For me, the primary motivation wasn’t calorie burning alone—I wanted to improve my running, boost my energy levels, and feel vibrant again.
The Experience: Challenges and Rewards
The first few weeks were tough. The intense bursts pushed my limits, and I often felt my heart rate soar, struggling to come down afterward. But gradually, I noticed a shift. Mid-afternoon energy slumps—a frequent problem for me—became less pronounced. I felt more alive and alert during the day, even as the Wisconsin weather shifted from summer warmth to the cool embrace of autumn.
Despite some mishaps (yes, I hilariously took a hard berry to the head from an overhanging branch), the sense of progress was undeniable. My endurance improved, recovery got easier, and I even developed a newfound appreciation for the controlled challenge this training style demands. Running past neighbors led to awkward but memorable waves, lending some humor to the routine.
Adjustments and Lessons Learned
-
Listening to the Body: I discovered the importance of not pushing through when feeling unwell. Research advises against intense exercise when you’re coming down with a sickness, a lesson I took seriously during a brief scare.
-
Nutrition and Hydration: With increased exercise intensity, my appetite grew. Eating more calories—likely a combination of muscle gain, water retention, and increased energy needs—became necessary. I also learned to prioritize electrolyte balance to avoid dizziness and cramps, making hydration a crucial part of my regimen.
-
Consistency: Sticking to three sessions per week in cooler weather made the practice sustainable without overwhelming my body.
Reflections on the Journey
Two months into HIIT running, I can confidently say this training method has breathed new life into my fitness routine. My knee improved, my stamina increased, and my energy levels soared when I needed it the most. While it’s not for everyone—especially complete beginners or those nursing injuries—HIIT offers a highly effective path for those ready to challenge themselves and embrace change.
As I continue this journey, I’m motivated not just by a pursuit of speed or stamina but by the joy of feeling strong, capable, and energized in my own body. If you’re contemplating a fitness reboot, consider the interval approach—it might just awaken your “old man body” and remind you what it means to really move with purpose again.
Embracing HIIT transformed my approach to fitness—from frustration to fulfillment—and it could do the same for you.
