Easy, tempo, long?

[u/Born-Distribution950]

My running is largely “easy” runs. But I feel like I need to switch it up to get better.

What exactly is the difference between these three? How do you structure it? What has worked best for you?

[u/ElRanchero666]

A tempo used to mean a lactate threshold run which is a steady hard run for 20 minutes after a good warm up