The track is the obvious place for interval training, but even if it's not at the track I find it a lot easier to do reps over a defined route, rather than programming into a watch, so that you've got a defined end point to aim for. I've got various non-track venues that I use for a change of scenery and/or for longer reps or tempo sessions where I think too much track-bend running might be a bad idea. Measure out standard distances, e.g. mile/km, or just random distances if laps are more convenient. (Off the top of my head, Sutcliffe Park = 0.85 miles, Dulwich Park = 1.05 miles, Millwall Park = 0.5 miles, Greenwich Park flat figure-of-8 loop = 1.2 miles, etc.)
The track is the obvious place for interval training, but even if it's not at the track I find it a lot easier to do reps over a defined route, rather than programming into a watch, so that you've got a defined end point to aim for. I've got various non-track venues that I use for a change of scenery and/or for longer reps or tempo sessions where I think too much track-bend running might be a bad idea. Measure out standard distances, e.g. mile/km, or just random distances if laps are more convenient. (Off the top of my head, Sutcliffe Park = 0.85 miles, Dulwich Park = 1.05 miles, Millwall Park = 0.5 miles, Greenwich Park flat figure-of-8 loop = 1.2 miles, etc.)