Short and fast workouts - why they work

This week I'll explain my reasoning as to why I believe that short, hard efforts are very beneficial to me becoming a faster runner. And I do believe these will work on me, regardless of my 350+ lbs weight.
Season 2024 goals!
PR in strava! - YES!
400 individual exercise in Strava - 183/400
Run abroad Technically done!!
50 videos uploaded on this channel this year - 22/50
10 Parkruns - 5/10
Lose weight - 162kg down to I don't know right now