Pochettino worked with Lambert at Southampton.
â€œIt wasn't the [training on] Fridays that was a shock, it was the Mondays when I'd played 90 minutes [at the weekend]," Lambert told BBC Radio Solent.
â€œWe would come in and to everyone else it was just a three-quarter kind of pace, like a jog to three-quarter pace, we used to do 12 horseshoes.
â€œBut to me it was three-quarters and above, I was like 'what on earth is going in here' I just could not cope."
Shocked by the intensity at which Pochettino had his players working after a matchday, Lambert and former Saints defender Jos Hooiveld looked to persuade their manager to change his ways.
â€œI thought, it was me and Jos Hooiveld who actually had the bottle to go into his [Pochettino's] room and pull him to one side, very respectfully.
â€œI said 'Mauricio listen, I understand what you're trying to do but I just think you're pushing us too much on a Monday and you need to calm it down, we're not used to it so maybe build it up a bit later.'
â€œMauricio was dead polite he said 'yes, that's fine I understand' â€“ we shook hands, I went out and we went back to the lads made up thinking 'yep, just done it for you boys, next Monday gonna be sorted.
â€œSo, played the game [the next weekend], 90 minutes again, come in Monday, not only did we do 12, we did 24 runs â€“ 24 runs and I just knew, I was running around laughing and almost crying and I knew what he was doing, he was breaking me and he did, he broke me."