6 x 800m and 1 x 200m track

I want to make my track session harder.   I need to get maximum gain out of each session, so I will try hard to make these sessions count.   I need fitness and speed back so longer speed sessions will give me this.

So today I opted for 6 x 800m and 1 x 200m this would give me 5km in total.

I started out a little conservative,  its been a long time since I have done these and I remember how quickly they fatigue you.  I felt good but a little off.  I had 2 mins break and then started again.  This time I felt better, hips were moving better and my stride felt long and easy.

My next few 800s were simular and while I was feeling tired I was able keep my pace up.....just.

My 800s are
4.30
4.28
4.24
4.24
4.26
4.23

200
0.56

Total time for 5km would be 26.11

Avg heart rate 149 max 179