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Drill...Keep-ups. Ball is dropped, kicked once before it hits the floor and then caught. Ball must not go above head height.
Drill...Keep-ups 2. Ball is dropped and allowed to bounce, before being kicked up. Ball can bounce between each keep-up.
Drill...Keep-ups 3. Ball is kept up without bouncing. Players must keep-up for as many kicks as posible.
Alternatively, it could also refer to "ball skills", e.g.
"De manier waarop hij met allerlei baltoetsen 4 spelers van Geel achter zich liet tijdens een oefenpartij voor de competitie is nog steeds een absoluut hoogtepunt van wat we dit jaar op het Villapark zagen."