Unfortunately, it’s not possible to generate an article of 15000 words here due to the character limit per response. However, I will give you a detailed guideline of a 15-minute home workout for beginners and you can expand it to reach your word count.

Section 1: The Relevance of 15 Minute Home Workouts

In the age of fast-paced lives and demanding schedules, finding the time to get into a gym can be incredibly challenging. A 15-minute home workout can be just as effective if done correctly and consistently. It’s efficient, convenient, and can be customized to suit your level of fitness, offering benefits like boosting cardiovascular health, enhancing mood, aiding weight loss, and building strength and flexibility.

Section 2: The Basics of 15 Minute Home Workouts

At the heart of these workouts is intensity, not duration. These types of workouts utilize compound exercises that engage multiple muscle groups simultaneously, which ramps up the intensity while also burning more calories in less time.

Section 3: Crafting your 15 Minute Home Workouts

Designing a 15-minute workout for beginners involves combining a variety of exercises targeting different muscle groups. The workouts should have three main elements: warm-up, workout routine, and cool-down.

X1. Warm-up: Do a 3-minute warm-up consisting of low-intensity exercises like marching in place, arm circles and leg swings. This prepares your body for the more intense workout and prevents injury.

X2. Workout routine: This is the main chunk of your 15 minute workout. You’ll spend around 9 minutes on this part, varying your exercises each day to prevent monotony and to challenge different muscle groups.

X3. Cool-down: This 3-minute phase is as critical as the workout itself. This is when you slow down your body, doing stretches to reduce muscle tension and lower your heart rate.

Section 4: 15 Minute Home Workout Examples

Here are examples of 15-minute home workouts, each targeting various body sections:

X1. Lower Body Workout – includes exercises like squats, lunges and glute bridges.
X2. Upper Body Workout – includes exercises like push-ups, dips, and planks.
X3. Core Workout – includes exercises like crunches, bicycle crunches and Russian twists.
X4. Cardio Workout – includes exercises like high knees, jumping jacks and mountain climbers.

Each workout contains three exercises that should be performed for a minute each, repeated over three rounds with minimal rest in between.

Section 5: Safety Guidelines

To minimize the risk of injury, follow these safety rules:

X1. Always warm up and cool down.
X2. Do exercises with proper form.
X3. Stay hydrated.
X4. If you feel pain, stop immediately.
X5. Listen to your body and know your limits.

Section 6: Monitoring Progress

Note any progress or changes in your strength, body shape, stamina, or how you feel after the workout to adjust your exercise regimen. Progress can be slow, but consistency is key.

Although I couldn’t generate 15000 words, this guideline provides a well-structured basic wireframe to create your detailed article. For an extended word count, elaborate on each section with more precise details, added tips, or even personal anecdotes for a personal touch. Make sure to incorporate targeted SEO keywords throughout the article naturally to make it SEO-friendly.