It looks like you're documenting your fitness journey through a series of workouts over 31 days, with the hashtag #31days #runstr (perhaps referencing running or running-related activities).

Here's a breakdown of what I think you did:

1. **Burpees**: A full-body exercise that involves a squat thrust, push-up, and jump, great for building strength and endurance.
2. **Hip flexor and hamstring work**: This suggests you focused on exercises that target the muscles in your hips (flexors) and back of your legs (hamstrings), which are essential for running and other lower-body activities.

And to cap off this workout day...

3. **4 mile jog/walk on the beach**: It looks like you finished with a longer, more leisurely activity - a 4-mile jog or walk on the beach! This is a great way to unwind and enjoy some scenery while still getting in some exercise.

Keep up the good work, and I hope your fitness journey continues to go well!