Related Experiment Video
Updated: Apr 18, 2026
03:52
The Creation of a Rat Model for Osteosarcopenia via Ovariectomy
Published on: February 21, 2025
1.6K
Exercise training, creatine supplementation, and bone health in ovariectomized rats
I H Murai1, H Roschel, L V S Pabis
1School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil.
Summary
Exercise training significantly improved bone health in ovariectomized rats, increasing bone mass and strength. Creatine supplementation did not show beneficial effects on bone density or strength in this study.
Area of Science:
- Bone research
- Exercise physiology
- Nutritional science
Background:
- Ovariectomy in rats is a common model for postmenopausal osteoporosis.
- Creatine supplementation is explored for potential bone benefits.
- Exercise is known to positively impact bone health.
Purpose of the Study:
- To investigate the effects of exercise training alone or combined with creatine supplementation on bone health in ovariectomized rats.
- To assess bone mineral content, density, biomechanical properties, and histomorphometry.
Main Methods:
- Ovariectomized Wistar rats were divided into five groups: sham-operated, non-trained placebo, non-trained creatine, trained placebo, and trained creatine.
- Exercise intervention involved downhill running for 12 weeks.
- Creatine supplementation was administered at 300 mg/kg body weight.
Main Results:
- Exercise training significantly increased whole body, femur, and lumbar spine bone mineral content and density.
- Exercise training improved bone strength, including maximal load, stiffness, and toughness.
- Creatine supplementation showed no significant effects on bone parameters, with no interaction effects observed between exercise and creatine.
Conclusions:
- Exercise training effectively attenuated ovariectomy-induced bone loss in rats.
- Creatine supplementation did not provide additional benefits for bone health in this model.
- Exercise is a key factor in maintaining bone health in the context of estrogen deficiency.
Related Concept Videos
01:25Role of Vitamins in Maintaining Bone Health
6.1K
The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
6.1K
01:29Bone Disorders
8.8K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
8.8K
01:31Osteoclasts in Bone Remodeling
4.9K
Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
4.9K
01:27Exercise and Muscle Performance
6.4K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
6.4K
01:31Essential Minerals for Bone Health
7.4K
The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
7.4K