26 year old and a female for reference, 5’1 and 108 lbs. I have been doing all out 40s and 60s and hitting my top end speeds 1-2x a week before runs plus weight work on my legs 2x a week in the gym for about a year but despite this I am stuck at around 15 seconds in a 100m sprint. I just cannot get faster no matter what I do. Those workouts are just additions to running 40 miles per week (base for 10k training + 1 vo2 max session a week) so I am not following a dedicated and focused sprint programme but I am however undeniably putting in a little bit of work reguarding speed and did expect to shave about a second off over the course of a year while keeping my miles up, considering I have not responded or improved despite doing this - is there any point in carrying on doing all of these top end speed intervals? I have been into energy system training and I do take appropriate rest before beginninng the next rep and I do it after a warm up on fresh legs.
I did a bit of soccer as a kid but was never the fastest sprinter on the field so perhaps I have already hit quite close to my potential but the situation being my speed potential just isn’t that fast?
I just get very confused because I quite literally see videos of obese men who look like they have never done any exercise in their lives running about the same time over 100m as I can and it’s just sort of disheartening to feel so slow when I spend so much time on my legs.