Dehydrating Rehydrating Question

Let's say there is a weightlifter who usually lifts 170 kg in competitions. Sometimes he lifts a bit more and sometimes not quite that much, but generally he lifts about 170 kg. If this guy lost 10% of his body weight and then started putting it back on ~36 hours before a competition, as many boxers do before a fight, would he still be able to lift his 170 kg?