PLAY
Calcium is the most abundant mineral in the body, concentrated primarily in the bones and teeth. It serves as the structural foundation of the skeletal system and functions as a critical signaling molecule for muscle contraction, nerve transmission, and blood clotting. Multiple factors regulate calcium homeostasis, including parathyroid hormone, vitamin D, phosphate, and magnesium concentrations. (source, source) Further, calcium also plays a direct role in intracellular signaling cascades that regulate gene expression, hormone secretion, and enzyme activation. Disruptions to calcium balance compromise neuromuscular function, bone integrity, and cardiovascular performance. (source)
Low serum calcium levels stem from physiological factors affecting the parathyroid glands and kidneys, which regulate calcium balance in the body. Insufficient intake of calcium-rich foods and nutrients like vitamin D, which drives calcium absorption in the intestine, also contributes to decreased serum calcium levels. (source, source)
Potential Performance Impact:
Prioritize calcium-rich foods: Dietary calcium intake raises serum calcium concentrations by providing the raw substrate for absorption in the small intestine. (source)
Protocol: Consume at least two servings of calcium-rich foods daily. One serving examples: Greek Yogurt (1 cup), Sardines (3 oz), Cheddar Cheese (1.5 oz), Milk (1 cup).
Engage in aerobic training: Aerobic exercise normalizes calcium levels by increasing plasma parathormone, which mobilizes calcium stores. Exercise also stimulates calcium absorption in the intestines. (source, source)
Protocol: Follow a structured program ensuring at least 150 minutes of moderate intensity (50 to 70% max heart rate) or 75 minutes of high intensity (75% max heart rate or greater) per week.
Supplement with calcium: Calcium supplementation directly raises serum calcium concentrations. (source)
Protocol: Supplement with at least 500 mg of calcium daily.
Elevated serum calcium levels stem from physiological factors involving the parathyroid glands and kidneys, which regulate calcium balance. Excessive intake of calcium-rich foods or supplements also contributes to increased serum calcium levels. (source, source)
Potential Performance Impact:
Limit calcium-rich foods: Overconsumption of calcium leads to increased calcium levels in the blood. (source)
Protocol: Monitor and limit excess consumption of calcium-rich foods, like milk, seeds, and lentils.
Train regularly: Physical activity normalizes serum calcium levels by regulating parathyroid hormone and driving calcium into bone and muscle tissue. (source, source)
Protocol: Follow a structured training program that includes at least 150 minutes of moderate intensity or 75 minutes of high intensity aerobic work per week, plus resistance training with moderate to heavy loads at least twice per week. The final set of each resistance exercise should be taken within two repetitions of failure.
Avoid calcium supplementation: Over-supplementation of calcium leads to increased calcium levels in the blood. (source)
Protocol: Monitor calcium intake and concentrations in supplements.
Supplement with vitamin C: Vitamin C supplementation decreases calcium levels by aiding in a reduction of parathyroid hormone, which lowers calcium mobilization from bone. (source)
Protocol: Supplement with at least 100 mg of vitamin C daily.
Avoid excess vitamin D: Over-supplementation of vitamin D increases intestinal absorption of calcium, raising levels in the blood. (source, source)
Protocol: Monitor excess vitamin D intake and supplement concentrations.
