Fartlek fun: unstructured speed play

Warm-up

Begin with a gentle jog to gradually elevate your heart rate and prepare your muscles for the work ahead. Focus on a relaxed pace where you can easily hold a conversation. Follow this with dynamic stretches that mimic running movements, such as leg swings and walking lunges, to improve mobility and prime your running mechanics.

Workout

This session is an unstructured fartlek, meaning "speed play." The idea is to randomly integrate faster efforts throughout your run. Listen to your body and the environment. See a lamppost 100 meters ahead? Sprint to it. Feel good for a full song on your playlist? Pick up the pace significantly. The recovery between these efforts is a comfortable jog. No strict intervals, just responsive changes in speed.

Your fast efforts should be sustained and challenging, taking you to a perceived exertion of 7-8 out of 10. Your recovery jogs should bring your heart rate down, allowing you to breathe comfortably, a 3-4 out of 10 perceived exertion. Vary the length and intensity of your efforts based on how you feel. The goal is to keep moving and challenging your body without rigid timings.

Cool-down

Transition from your final efforts to a comfortable, easy jog. Gradually decrease your pace until you are walking. Finish with static stretches, holding each stretch for 20-30 seconds. Focus on major running muscles: hamstrings, quadriceps, calves, and hip flexors. This helps to improve flexibility and aid recovery.

Coaching notes

• Listen to your body: Fartlek is about intuition. If you feel tired, shorten your efforts or extend your recovery. If you feel strong, push a little longer or harder.
• Effort over pace: Don't get caught up in exact speeds. Focus on the effort level. Some days a 'fast' effort might be slower than others, and that's okay.
• Form awareness: Even during your faster segments, try to maintain good running form: tall posture, slight forward lean, quick cadence, and relaxed shoulders. Avoid looking down at your feet.
• Breathing: Practice controlled breathing throughout. During your hard efforts, you'll be breathing heavily, but try to find a rhythm. During recovery, focus on deep, calming breaths.

Scale it

• Easier: Reduce the duration and intensity of your fast efforts. Focus more on extending the recovery jogs. You can also shorten the overall duration of the main workout block.
• Harder: Increase the duration and intensity of your fast efforts. Shorten the recovery jogs, or make them a 'float' where you maintain a pace slightly faster than a typical recovery jog, but slower than your full effort.