Interval session@tracks (humidity: 75%; temperature: 16°C) 2km (slow jog) > 400m (sprint) x 400m (jog) [10 times] > 1km (recovery) When I said 'sprint', it wasn't exactly 'sprint' like you guys do. Managed barely within 5 min/km in the first few pairs but waned since. A loooooooooong way to go.