Test Preparation Guide: Get the Best Results from Your Blood Test

How you prepare for your blood test affects accuracy and comfort. This guide covers everything from the night before through collection day to ensure your results are meaningful and your experience is smooth.

The Short Version (TL;DR)

• Fasting: Not required for Honed panels
• Hydration: Drink normally the day of your test
• Exercise: Avoid hard training 24-48 hours before collection
• Sleep: Get a good night's rest
• Timing: Morning appointments are ideal
• What to bring: Photo ID, wear comfortable clothing
• Arrival: Come 5-10 minutes early

The Night Before Your Test

Sleep Well

Get 7-9 hours of sleep the night before. Poor sleep affects cortisol, immune markers, and glucose levels ^[1]. If you're testing for recovery and sleep quality, this matters.

Eat Normally

Don't fast or restrict food. Eat your normal dinner. Our panels don't require fasting (unlike some glucose tolerance tests). Having food in your system doesn't affect your results.

However: If you have a very late or very large meal, eat normally at dinner and eat lighter after 8pm. This helps with general comfort.

Stay Hydrated

Drink water normally throughout the evening and morning. Good hydration ensures your veins are accessible and blood flows easily during collection ^[3]. Dehydration can cause difficult draws and hemoconcentration (artificially high-looking markers).

Avoid excess caffeine late in the day (it affects sleep, which affects cortisol and other markers).

Avoid Alcohol

Don't drink alcohol the night before. Alcohol affects liver function, lipids, glucose, and cortisol. For accurate results, skip it.

Take Your Usual Medications

If you take daily medications (blood pressure, thyroid, etc.), take them as normal. Stopping medications can skew results and isn't worth it for a single blood test. Let your healthcare provider know what you're taking when interpreting results.

Manage Stress

High stress elevates cortisol. If you know you'll be stressed the day of your test, try to keep the day calm and relaxed. Go for a walk, meditate, or do some light stretching. Avoid high-stress situations the morning of your appointment.

The Morning of Your Test

Timing Matters for Cortisol

Cortisol is highest in the morning and drops throughout the day. If you're tracking cortisol specifically, morning testing (7am-10am) is ideal for consistency ^[4]. If your appointment is later in the day, that's fine: just note this when comparing results across tests.

Eat a Light Breakfast (Optional)

You don't have to fast, but you don't have to eat either. Have a light breakfast if you're hungry. A small meal won't affect your results. Some people prefer testing on an empty stomach simply for comfort (no nausea risk from the needle).

If you do eat:

• Light, balanced breakfast (toast with peanut butter, yogurt with berries, oatmeal)
• Avoid very heavy or greasy food
• Drink water

Avoid Intense Exercise

Don't do hard training the morning of your test. Light activity is fine (walk, easy yoga, stretching), but skip your intense workout.

Why? Intense exercise elevates CK, cortisol, and other markers. If you test right after a hard workout, these values will be artificially high from that session, not your baseline ^[5].

Pre-test exercise guideline:

• 24-48 hours before testing: avoid hard training (intense cardio, heavy lifting, high-intensity intervals)
• Light activity (walking, easy cycling, stretching) is fine anytime

Hydrate Well

Drink 1-2 glasses of water the morning of your test. Continue the hydration from the night before. This ensures good blood flow and easy collection.

Wear Comfortable Clothing

Wear a short-sleeved shirt or a shirt with loose, easy-to-roll sleeves. The phlebotomist needs easy access to your inner arm for the needle. Avoid tight sleeves that require complete removal: uncomfortable and unnecessary.

Bring Photo ID

You'll need to verify your identity. Bring your driver's license or passport.

The 24-48 Hours Before Your Test

This is the critical window for controlling variables. Here's what to adjust:

Training Schedule

Ideal: Schedule your test on a rest day or easy activity day.

What to avoid:

• Heavy resistance training (weightlifting, intense CrossFit, etc.)
• Hard cardio (tempo runs, threshold intervals, HIIT)
• Long endurance sessions (unless testing at that baseline)

Fine for testing:

• Light walking
• Easy cycling
• Stretching and mobility work
• Yoga
• Recreational activities

Why? Hard training elevates CK, cortisol, lactate, and inflammatory markers for 24-72 hours ^[5]. If you test right after, you're measuring training response, not your resting baseline. Unless you specifically want that data (e.g., tracking CK response to a session), test on an easy day.

Diet

Eat normally. You don't need to change anything for accurate testing. But:

Avoid:

• Large amounts of alcohol (24 hours before)
• Excessive sugar or very heavy meals the night before
• Fasted workouts right before testing (eat something light after)

Consider:

• If you're tracking cholesterol or triglycerides, eating normally (not a restrictive diet) gives accurate baseline
• If you want to see how a particular diet affects lipids, be consistent for a few days before testing

Supplements

Take your regular supplements as normal. No need to stop anything. If you're testing to see whether a new supplement is working, that's fine: just be consistent between tests.

Avoid starting a new supplement right before testing; wait a week or two so you're taking it consistently if you retest.

Medications

Continue all regular medications as prescribed. Don't stop anything without talking to your doctor.

Collection Day: Step by Step

Arrive Early

Plan to arrive 5-10 minutes before your appointment. Arriving early allows you to:

• Settle in and calm any nerves
• Verify your details with the phlebotomist
• Sit for a minute before the needle (especially if you're anxious)

What to Expect

Check-in (1-2 minutes):

• Phlebotomist asks your name and verifies your identity
• They confirm which test you're having
• They note any relevant details (medications, fasting status, etc.)

Collection (5-10 minutes):

• You sit in the collection chair
• Phlebotomist cleans the inside of your arm with an alcohol wipe
• Small needle enters a vein (usually in the inner arm, below the elbow)
• Blood flows into collection tubes
• Process is quick (usually 30-60 seconds once the needle is in)

After collection (1-2 minutes):

• Phlebotomist removes the needle
• Applies pressure and a small bandage
• Gives you a collection receipt

Total time: Usually 10-15 minutes, sometimes faster.

Managing Needle Anxiety

Nervous about needles? You're not alone. Here's what helps:

• Tell the phlebotomist. They're experienced with anxious clients and will go slowly and explain each step.
• Look away. You don't have to watch the needle.
• Deep breathing. Breathe slowly and deeply during collection.
• Focus on something else. Think about your training goals, a calming place, or count to yourself.
• Recline if needed. Ask if you can lie back instead of sitting: this reduces vasovagal response (dizziness).
• Bring someone. Have a friend or family member wait with you if it helps.

Vasovagal response (fainting or dizziness) is rare, but if you're prone to it, mention it to the phlebotomist. They'll have you lie down and take extra time.

What to Do After Collection

Immediately after:

• Keep the bandage on for at least 10-15 minutes (prevents bruising)
• Don't use the arm for heavy lifting for the rest of the day
• Stay hydrated (drink water throughout the day)

Bruising is normal: Small bruises or slight soreness at the collection site are normal and resolve in a few days.

If you feel lightheaded: Sit for a few minutes. Drink some water. Most people feel fine immediately; if you're not, ask to rest before leaving.

Resume Normal Activity

• Light activity that day is fine
• You can return to normal training the next day
• Most people have no restrictions after collection

After Your Test: What to Expect

Results timeline: 3-5 business days after collection

How you'll know: Email notification when results are ready. Log into your account to view.

What you'll see:

• Individual marker values
• Your result status (normal, low, high)
• Reference ranges explained
• Guidance notes interpreting what each means

Share with your provider: Download your PDF results and email to your doctor, coach, or sports scientist.

FAQ: Test Preparation

Q: Do I need to fast? A: No. Honed panels don't require fasting. You can eat and drink normally the morning of your test.

Q: What if I took my medications? A: That's fine. Take your regular medications as prescribed. Let your healthcare provider know what you're taking when interpreting results.

Q: Can I exercise the day of my test? A: Avoid hard training for 24-48 hours before testing. Light activity (walking, easy cycling) is fine. Hard training elevates markers from the session, not your baseline.

Q: What if I couldn't sleep well before my test? A: One night of poor sleep will show in your cortisol and potentially glucose. If this is important to you (tracking sleep quality effects), note it when you view results and plan to retest when rested. One poor night is data too: it shows how sleep affects your markers.

Q: What if I had alcohol the night before? A: This affects lipids, liver function, and cortisol. If you want accurate baseline data, avoid alcohol 24 hours before testing. If you did have alcohol, note it when reviewing results.

Q: Can I donate blood before/after my Honed test? A: Space them out. Blood donation removes a significant amount of blood, affecting your results. Wait at least a few days after donation before Honed testing.

Q: What if I'm on my period? Does it affect results? A: Some markers (hemoglobin, ferritin, iron) can be slightly affected by menstrual status. Heavier periods may show lower iron values. If tracking these markers, note your cycle. Testing in the luteal phase (second half of cycle) is typically more consistent, but testing anytime is fine.

Q: What if I had a hard workout yesterday? Should I reschedule? A: If you trained hard yesterday, wait another day before testing (48 hours from hard training). If you can't wait, note it in your account: your results will be higher for markers like CK and cortisol from yesterday's session, not your true baseline.

Q: What if I'm feeling sick or under stress? A: Being sick or highly stressed will affect your results (elevated CK, cortisol, markers of stress). If possible, wait until you're well and calmer. If you can't wait, note it. Stress and illness are also data if you're tracking how they affect your markers.

Q: Can I have coffee before my test? A: Yes, a normal amount is fine. Coffee doesn't significantly affect most markers. If you're a regular coffee drinker, have your normal amount (otherwise skipping it might cause stress/low energy). If you usually don't drink coffee, skip it the day of your test.

Q: What if I forgot to follow these guidelines? A: Don't worry. Your results are still valid and informative. Just note what was different (hard workout, poor sleep, alcohol, stress) when reviewing results. This context helps interpretation.

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This guide is educational. Always follow your healthcare provider's specific pre-test instructions if they differ from these guidelines.