Ok - I'm currently fitness training a group of 8-12 junior players once a week, and I'm keen to do more of this sort of training. My background is that I have been both a fitness instructor and trainer in gyms and also for some sports teams. Here's the criteria: Circuit goal: All-round fitness with a focus on some muscle-work (endurance), most (I daresay all) of these kids don't do any resistance-training Location: A "double" tennis court (two joined courts). Synthetic grass surface. Large grass park available, but often very damp due to winter dew. Duration: 30 mins including a quick-post-stretch, participants already warm Stations: 10 stations, intended duration 45 secs Equipment: As little as possible, certainly no more than can fit easily in a gear bag. Mode: Probably pair the kids up, giving them someone to work with & help each other out. Now, the hard bit... the stations themselves. I'm thinking: 1. 5 step sprints: start at fence, 5 step sprint, slow down by net, stop, turn around, repeat. 2. Pushups: Straightforward pushups, 'narrow' for the advanced (tricep focus), from knees for the beginners 3. Side-skipping: Half-length of court side-skipping. 4. Crunches: Abdominals station with different ab exercises for different levels of fitness. 5. Jump-rope: Straightforward jump rope 6. Lunges: Aiming for some leg-muscle-endurance work (maybe should be squats).7. Agility run: Cones placed out in a course, run course & repeat 8. Dumbell row: Targeting some back work (difficult in a non-gym capacity, open to some other ideas here) 9. Star-jumps: An old circuit favourite, simple, easy, etc. 10. Medicine-ball passing: Chest-passing a medicine ball. I'm happiest with the first half of the stations, and I'm open to input on any station, or the order in general. I'm especially looking for something to replace '10' simply so I don't have to lug around a medicine ball. Also - if you have done a tennis-fitness circuit, feel free to post the details... Cheers!