The sessions will really help with your confidence, going into training and matches which is a massive part of the game.
Dukesy bases his sessions on high intensity after being able to watch Mauricio Pochettino daily. Seeing the demands first hand of a Premier League team/players who push themselves to their full potential in training sessions and matches.
Hard work beats talent, all day. If your work ethic is there the sky is the limit for any player.
Having the right mindset and focus in training will excel you in matches, everything you do should come off the training ground and if you are focused in training, you will be come match day.