Which is tired, the cold dish master or the waiter?

1. workload: the cold dish chef only needs to cook cold dishes, and then he can have a rest. The workload is small, and the waiter needs to keep serving the customers, which is heavy.

2. Walking: The cold dish chef only needs to cook cold dishes in a fixed position, and does not need to walk. The waiter needs to walk back and forth to serve the customers, and the waiter is tired.