1. Sports training device comprising: a training means ( 1 ) with, at least, one rotatable member ( 2 ) having a variable resistance against a physical force applied by a user; at least one first sensor ( 6 ) for monitoring at least one physical condition of the user; at least one second sensor ( 7 ) for monitoring at least one mechanical condition of the training means; a monitoring and communication unit ( 3 ) for monitoring data regarding the at least one physical condition of the user and the at least one mechanical condition of the training means ( 1 ) and transmitting the data; and a training simulation and control unit ( 4 ) connected to the monitoring and communication unit ( 3 ) and receiving the data regarding the at least one physical condition of the user and the at least one mechanical condition of the training means, the training simulation and control unit ( 4 ) comprises one or more control systems ( 5 ) controlling variation in resistance applied by the rotatable member ( 2 ) of the training means ( 1 ) through a wireless connection between the training simulation and control unit ( 4 ) and the monitoring and communication unit ( 3 ); and a remote planning system ( 22 ) connected to the monitoring and communication unit ( 3 ) and the training simulation and control unit ( 4 ) by means of an Internet connection, wherein the remote planning system ( 22 ) is configured to generate a training plan based on the data regarding the at least one physical condition of the user and the at least one mechanical condition of the training means.