In short, yes they can. However, a diet and mediocre workout program will certainly decrease your testosterone's effectiveness. A great training program and proper nutrition can help you build muscle and increase testosterone levels.
Parker Hyde, a certified strength coach, shows how to maximize your level through working out in the gym, in the article “How to naturally increase testosterone release through exercise.” In short, the load (or “intensity”), the total volume, the choice of exercises, and even the order of the exercises can have an impact.
Similarly, amino acids in a protein-rich diet play a large role in both testosterone and muscle growth. As Ph.D. Chris Lockwood explains: “In conjunction with workouts that increase the sensitivity of the androgen receptors and the consumption of essential amino acids necessary to support protein synthesis, the effect of testosterone on muscles and performance is greatly enhanced. "[3,4]
Therefore, before taking a single portion of the test amplifier, make sure that you are set up for success. Exercise in accordance with a well-developed muscle building program and make sure that you consume enough protein and total calories depending on your body weight, goals, and activity level.
Focus on proper nutrition and hard workouts, and your testosterone booster will cost more!