Lengua inglesa
1 a period of time between two events.
2 a space or distance between two things.
3 Brit a short break between the acts of a play or opera, or between parts of a concert or long film.
4 music the difference in pitch between two notes or tones.
[13c: from Latin intervallum space between pallisades]
at intervals
1 here and there; now and then.
2 with a stated distance in time or space between at intervals of ten minutes .

© Hodder Education
interval training same as fartlek

© Hodder Education