in minutes that a weights workout should be limited to?

Limit a weights workout to about 45–60 minutes of hard work; regularly going beyond an hour may make recovery harder. 1

• Huberman’s personal sessions: He described doing roughly 45–60 minutes of real work, typically three or four times per week. 2
• Recovery: Huberman said sessions longer than an hour—and especially beyond 75 minutes—left him fatigued; he also noted that longer hard sessions can impede recovery. 3