How to Analyze RingConn Data in Excel — and the 10-Second Alternative
The RingConn export gives you clean CSVs (here's how to get them), and Excel or Google Sheets will happily open them. The catch is that raw daily numbers answer the wrong question. "What was my HRV yesterday?" is noise. "Has my HRV moved over the last two months?" is signal. Here's how to get signal out of a spreadsheet — and what to use if you'd rather not build it yourself.
Step 1: Get the data into one sheet
- Unzip the export. Open Vital Signs — it has the date column plus heart rate, HRV, and SpO2.
- Sleep values live in the Sleep CSV and are in minutes — add a column dividing by 60 if you want hours.
- If you want everything in one table, match rows by the date column (VLOOKUP or just paste side-by-side — the exports share the same date keys).
Step 2: The three formulas that actually matter
Trend (window vs window). Don't eyeball the chart — compare two consecutive windows. With dates in column A and HRV in column B:
=AVERAGEIFS(B:B, A:A, ">="&TODAY()-60) / AVERAGEIFS(B:B, A:A, ">="&TODAY()-120, A:A, "<"&TODAY()-60) - 1
That's "last 60 days vs the 60 before, as a percentage." A move of ±5% or more between windows is worth believing. Less than that is usually noise.
Personal baseline. Your normal range, not the internet's: mean ± standard deviation over a trailing window:
=AVERAGE(B2:B61) and =STDEV.S(B2:B61)
A day outside mean ± 1 SD is unusual for you. That beats comparing yourself to population charts.
Weekday pattern. Add a column =TEXT(A2,"ddd"), then pivot (or AVERAGEIF) sleep hours by day name. Weekday-vs-weekend sleep gaps — social jet lag — hide in plain sight in daily views.
Step 3: Interpret like a skeptic
- One metric improving while another dips is normal. Look for the direction of the majority of your recovery metrics (HRV up, resting HR down, deep sleep up = good period).
- Never read causation off two columns moving together. "Steps up, HRV up" might both be caused by the same easier week at work.
- Small persistent changes beat big one-day spikes. A resting HR that drifts from 44 to 42 over two months means more than any single 38 bpm night.
The 10-second alternative
Everything above — windowed trends, personal baselines, weekday splits, plus things that are genuinely painful in a spreadsheet (sleep-stage composition over time, tagged-day comparisons with minimum sample sizes, best-stretch detection) — is what TrendArc computes automatically when you drop the export ZIP into your browser. Same math, zero formulas, and the data never leaves your device: no account, no upload, no server.